I would love/like the Prism tank to stay the same.
Mods/new-maps was also a thing that brought me back to the game at the time Red Alert 2 was new. I would love to download new maps and play them.
At the time it was console vs PC, and i would love to come back to the PC because new maps were available.
Now days i see new games that are remastered use the unreal engine software, but i wasn't a real big fan of that. For example when they made Renegade X, i love the new looks of it, but i don't like the feel of it. it just doesn't really remind me of the classic renegade because of the completely new engine. This is just a tip coming from me, i don't know if other people feel the same about Unreal Engine thing.