Alright then, time to unpack some stuff as he war ends.
Britain
How will Britain see this wars outcome? Minor defeat having lost land to the USA? mostly a victory? Wellington won't be pleased the Empire lost land despite his victories I expect.
Will Britain be more committed to their NA holdings now or will there be a desire to just hold the line in favor of expansion elsewhere? How will the success of the diverse Florida colony affect Imperial and racial policy going forward,compared to the revolt of a settler colony culturally close o the mother country? The second time that happened, after the American Revolution, I might add.
Louisiana:
Time For celebration in the republic. The small nation has weathered the storm an emerged with its borders intact and most of the country not ravaged by invaders. Wellington will no doubt be seen off with a hero's celebration with a square named for him and a statue likely planned.
But there won't just be revels. President Roman and others will be looking ahead and back. This war cost them many lives, Malaga in particular; another victory like this cold ruin them. As it is the status quo Roman was elected into cannot be reasonably maintained. The Afro-Louisianian irregulars cannot be ignored, and the fresh debts to abolitionist Britain place renewed pressure on slavery as an institution. And while the Republic is intact the loss of upper Canada's heartland is a clear sign Britain is not invincible along with the events of Mount Hope.
The union has been held in check, but it has advanced; and it is most likely they will be back for more. And signs indicate the union will be stronger next time with their rail network growing along with their industry and military might. Even if Britain remains committed the Republic can't hope for the likes of Wellington to be sent to their aid again.
The Republic cannot fight the next war like the late one and hope to survive. Roman won't be in office much longer which he may be grateful for but both parties will have to face how Louisiana can and will change to face a looming future. And how they will spend the reparation money.
Florida:
May see the least policy changes. This colony acquitted itself grandly handing the enemy numerous defeats and remaining united in turmoil. The biggest change here may be social, with the birth of a grater Floridian identity connecting the many peoples. Additionally we may see a renewed disdain among "White" Floridians for America.
An increased support militias and the like could also occur as war came once and so it may come again.
Canada:
Things have to change here.
One of the most populous regions has been lost and the Compact political establishment has been humiliated and lost one of their most important strongholds. And there is no reason they should think the USA will be sated. America wants to diminte the continent as ther misadventure in New Sapin attests too. They'll be back for the rest, and likely stronger than last time.
With Quebec it will hing on what accord Brougham and Papineau reach. Quebec may be elevated, ignore or stand as the dominant but not domineering force in a new order in Canada.
The Maritimes are not likely to be thrilled at potentially being dominated by Quebec, but the invasion of new Brunswick shows they share the fate of being targeted with their neighbors.
That said, I'm fairly certain that in this context no one cared much what the reality of the Iroquoian names was, and I'm a little concerned for the future of the Ontario Iroquois, frankly. So while they're objectively great names, they wouldn't become the name by merit, but more likely by fluke. Then a century later I suppose the etymology could be dusted off and enjoyed.
Might they relocate to the remainder of Canada? It sounds like peopel are thin on the ground; and ater the sucess in Florida a case could be made of vultivating string ties with ayives as bulwarks against America. One can hope it will lead to a fairer,(thoughp orably still unfair) policy towards the native peoples as Wesdtward Expansion continues.
Another investment one could hope to see in Canada would be a railroad liking the Eat and West now that America rules over too much of the Great Lakes.
Yes this is birth of a nation times for Canada with loss and the fires of war driving revelation ad reorganization that set the stage for generations I expect.
I'll give my thoughts on America later.