Yes it could be as easy as that. You'll only know for sure if you try it.
There are various reasons of a player limit in online MP: engine reasons, gameplay reasons, performance reasons...
Engine reasons are when a game engine simply doesn't support more players than X. And we don't know if BC's old engine has such limit.
Gameplay reasons are when the devs simply put the limit there because of the gameplay, like it just wouldn't be ok or something like that with more than X players.
Performance reasons are when the devs put the limit to ensure that the MP game runs in an acceptable performance. For example I once read an interview with <don't remember who from the Supreme Commander team>, in the period the game was launched, that the 8 player limit for online matches was there simply because up until then no PC would be able to run at an acceptable frame rate the game with more than 8 players, and the engine itself could support far more players...
Anyway if the engine itself of BC can support more than 8 players (that is the limit was not for 'engine reasons'), increasing the player limit shouldn't cause any problems...
Topic: More than 8 players MP? (Read 544 times)
