Guns
-It will ruin the economy,just like Zone and its policy of everything is tradable.
Sale
-This won't happen,but 2xmultipliers on sellables could be reintroduced like Black Friday somewhat making up for your idea.
Uploads
-There should be several checks to ensure each body is legal,for that particular body,it's very questionable and unquestionable that it got approved.
Events
-Team spar works the same way as ctf does,as in if you lose,you lose.
Events idea
-The sword event idea might not be popular,so I'd rather leave it to classic,as the mechanics originate from them.