I think it would be interesting to see how many of the people voting "no", use 2.0.2.1 and what reasons they would have for doing so. I don't really see any valid reason.
A valid reason is to let people use version they like. Yes, you can make some manipulations with MPQ to attach german keyboard to combat, you can also repack MPQ to add music or videos or w/e you want to play with.
You can also make some research to convert russian version supported windowed mode and steam overlay to 2.0.2.1 probably.
You can also disable UAC and DEP in your windows7 to make it work from program files as a default path.
But you should be at least an avdanced user, otherwise you just realize it's not possible or too complicated, install combat and refuse version you liked.
Another valid reason is if you are newbie: you just click the 1-st server line, get red obscure error message, something about improper version, try to click other servers, get several more red error messages and think that network is not work for this game.
Also, if you are scared of losing players, you could put a notice when you log in the game
Unfortunately war2 doesn't support custom messages while connecting the server. You just get standard one, feels something broken and closes that.
Anti Hack not gonna proof anything, only admin will know truth, also anti hack not gonna fix lag and your not gonna be able to caught hacker by your own if anti hack really caught something and WHO???
Antihack should show active hacks to anyone playing in the same game BTW. Everybody can try it.
I'll announce to test that when i make it.
Lag is not something related to versions, you probably mean warlatency incompatibility, it's not related to lagging.
So what is this anti hack about. Watching known hacks and monitoring our system???
Yes, something like that.
Watching known hacks, reporting to the server about that.
I would imagine having everyone on one client would benefit IL and team as well when it comes to development, testing, troubleshooting problems, etc.
I'd say different versions could have different problems. So some individual problem with combat could be resovled by using different version.
And closing version will not let to do that.