I don't really see how going to a completely different website boosts communications but I'll take you're word for it.
I like the forum here. The main reason why people don't communicate much via KHWikia Forum is probably because we've got other ways of communicating include our IRC Channel and our Talk Pages.
Putting our Forum on another site is pointless and silly in my opinion. If you want us to think about moving our forum into KHInsider then that's Ridiculous! Our forum isn't for 'socializing or making friends (even though I don't see why not) it's basically used for answering to Improve the Wiki, Gain Individual Opinions or Want Help.
Moving the Forum is unneccessary, I like it the way it is, the Forum is as much as part of the Wiki as the Rest of the Wiki, so why not put in on the actual website?
It's a good idea but "things are good the way they are".