It looks like it hasn't been updated since before open beta. It contains a lot of "players will be able to" and "gameplay might include" type phrases. It really needs to be updated to reflect what the game is now, as well as what has been discussed as possible future directions.
If Cryptic has a spare community person who can spend an hour on it, that can make all the difference. If not, perhaps some folks here might do it. (Don't bother if you don't think you can objectively describe the game.)
It is assuming that, yes. But Wikipedia expects people to follow the rules. If they don't follow them, some editor will likely notice it's from a Cryptic IP and just revert the changes then ban the user.
Read the rules again. It is not a violation of the rules and anything would be better than the total lack of information that's there now. (And, of course, no attempt should be made to hide who is doing the editing.)