Nugax answers questions!
- I think that the Brits would have to have a basically unchallenged domination on Baltic marine commerce to have such a sphere in Eurasia, and I truly doubt that a Swedish Livonia would serve that purpose....
If anything, having Baltic Sea to be total British sea from coast to coast would serve better for that purpose. In fact there has to be the manpower factor to be considered as well, and the nearer the better, wouldn't it ? 
- I'm not sure that Yugorussia entity is doable. Certainly that the map's PoD would be between 1500-1700, and with that early of a PoD, I don't think we are likely to see a Russo-Ukrainian entity emerging...
- Or... if we would judge from Osmanska Memalika, maybe even during the reign of Mehmed II... 
- And, in additional to the Baltic access, the British should be doing that from two directions, too. That means a comfortable enough access to Outer Manchuria.... that I think would instead require British Formosa and Japan... Formosa, since that it seems the Brits can't do it through Americas ITTL....
- And the last (but not "least" 
) is about our beloved Gurkanis
I personally think that you still haven't wank them enough... 





(though not by much for minimal.... just maybe "a bit more" advancement in Turkestani, considering the dynasty's historical origin... 
)
Well its not an entirely thought out timeline to say the least, but to answer your points.
1)The manpower required to control siberia is very little, obviously central asia came later, after railroads and steamships secured a route to the White Sea. Plus the capstone is actually Perm (or rather the Kama river), control that and the white sea and no one else can access the Siberian interior. It was possible to run the system much like British India with only occasional high value exports and communications to the metropol. Complete control of the baltic and its shipping stores would also put one on a collision course with all the maritime powers eventually

. Plus the Swedish control over the Baltic just gives more incentive to develop replacement markets and sources further east.
2) Yugorossia; "South Russia" is pretty generic and I was thinking of it as a more revolutionary state developing quite late on - a rutherian rebellion against a distracted Poland gradually picks up steam and unites the minor polities and cossacks, rather than the cossacks turning to Moscow.
3) Well I said changes start from 1400 on, so Mehmed II would be somewhat different

.
4) The British can go via north America as although the Holy American Empire dominates the Lower Mississippi basin they can go via the Hudson bay river routes and St Lawerence valley to get to the North Pacific (thanks to their experience in siberia, West Canada is settled much earlier by a Northern European-Tartar-Slavic mix). Plus in the age of sail its easy enough to go places with a semi-friendly East Indies
I think in the Americas I decided the HAE would control up to the 40th parallel or so, the British North of the lakes, and minor Indian, independent Dutch and French polities in between.
5)
Au contraire, wank them to much and they'll get complacent, this way strong rivals gives them an urge to excel (a role provided earlier by the stronger hindu states of the south)! Also the British intrusion into Turkestan basically caught them with their pants down as they focused on the Indian ocean (it took the British by surprise too, as they thought they were just going to show the Manchus a lesson). Plus - one of the worlds two great Superpowers, what more do you want?
RGB said:
Here's a list of etymological crimes:
1. Mordor - no way would the Mordvins end up being called that. Bacon calls them Moxels and Merdium. Rubrouc calls them Merdas/Merdinis. No language drift rule would ever produce "Mordor" from any of those starting points.
I agree, I thought it'd be funny

, though stranger renamings have happened.
2. Kirov - named after Sergey Kirov. Kirov was a nome-de-guerre inspired by Cyrus of Persia.
Research failure on my part, though and anglicisation of the Tartar name 'Hılın' is probably what would be used.
3. Ryazam - why?
The last letter's N-->M drift is odd for English, and impossible in the Slavic of the inhabitants (Ryazan actually has a meaning and would probably persist in its form).
M is next to N on the Qwerty keyboard, and I didn't notice the change

.
4. Tikhvin? Why? It's like Kingdom of Salop or Empire of Kilkenny. It's not completely insignificant but it's odd to make a capital; not to mention that most of the territory is largely underpopulated to this day. This is an odd place to have an independent state.
Tver-Muscovy and Smolensk ripped the territorium from Novgorod, but Sweden and the Muscovy Company stopped their planed annexations but decided a denuded Novgorod was a good idea. So they picked an insignificant town to be the capital of a rather artifical republic, and now they don't want to be reunited with Novgorod (things turn nasty when a trading city has little access to markets).
5. What happened to the Komi? That's a volkenwanderung-scale displacement from where they're really located.
Another brain fart, thats meant to be the Khanty.
6. What (or who?) are Rova?
Its taken from the root used in the russian town Manturovo (which is in the OTL region of the district), its Meri and Saami for 'Higher Place', here the upperlands of the Volga basin.
7. Given that Kazan exists (and Tikhvin too!), the PoD must be later than 1300. Now don't mind me but I will call British Tartary ASB is 1300 is your departure date.
Eh, the strangulation of the Muscovy Tsardom in birth may be at the low end of the probability scale (though the OTL early success did depend on some inspired leadership IMO, and nothings easier than have disease fell a few good men), but once that's done I don't think its particularly harder than what happened in India or Argentina.