Just been reading this as I said I would in the other thread. Free time came up and I looked forward to doing so! Firstly I want to say
@Henderson you've done a very good job portraying what is plausible for Justinian's character, especially pre-overthrow. The anger boiling under the surface, the desire and impetuousness to take bold steps, with a degree of rashness and the absolute belief in his convictions.
Sebastopolis is a good POD. Much can change from this point forward, just as there are plenty of challenges for the Empire to face, there are good opportunities too. Without Leontius being thrown into jail thus far that's another change to add to the mix and creates some interesting paths to go down. Basically winning that battle allows at least four PODs to happen, as you can count the Sclaveni staying on side and the capture of Muḥammad ibn Marwān in addition to winning and fate of Leontius, so that's well thought out as a point to start with as well.
I do like the historical notes you add to each part and they are informative. You've clearly done a decent amount of research and that's always welcome in a TL.
I noticed Justinian's brother Heraclius is about in this TL. That adds some further dimensions to follow. There's plenty here to hold readers' interest, and I have to say well done for choosing this Emperor as there are barely any TLs done about him at all on this website, or indeed anywhere else.
As I have long had an interest in this particular Emperor since before I started my own TL on him all those years ago, you have my thanks and good wishes for a good idea and I'm looking forward to future parts and seeing where this goes.
"Tu Vincas, Justinian!".
Sargon