I actually think this might result in a Sweden screw. A bigger Sweden might not actually be a better Sweden at all. Finland had started to get it's own identity under Russian rule. Some were nostalgic of the Swedish era, but a return to becoming a couple of backwards provinces from having been a autonomous Grand Duchy would not be popular.
I can see the language issue being worse than OTL. Now the Swedish speakers would have backing from Stockholm, and we might see crackdowns on the Finnish cultural awakening. Sweden would probably want to Swedify Finland, the last thing they'd want is another stubborn Norway on their hands. And Sweden is no Russia, keeping an unwilling population in check would actually be a choir.
And speaking of Norway, a larger Sweden might still consider itself something of a power player, and would not let the Norwegians leave the union peacefully.
I can see the language issue being worse than OTL. Now the Swedish speakers would have backing from Stockholm, and we might see crackdowns on the Finnish cultural awakening. Sweden would probably want to Swedify Finland, the last thing they'd want is another stubborn Norway on their hands. And Sweden is no Russia, keeping an unwilling population in check would actually be a choir.
And speaking of Norway, a larger Sweden might still consider itself something of a power player, and would not let the Norwegians leave the union peacefully.