I've got two suggestions for 2.5, the first being Assist's and the second an improved kill feed.
Assist's: Basically, If you shoot someone and your teammate kills the person whom you just shot but didn't kill - you get an Assist.
Improved kill feed:
The improved kill feed would show with what weapon someone was killed, and if it was a headshot. Now you may think, but we already have this! Yeah we do, just not with symbols, right now we have this as solid text. And I think it would look better with symbols.
I made a little picture of how the improved kill feed could look like: http://prntscr.com/ank7ba
Copy -> Lite Railgun -> Headshot -> Eric Gurt (Picture explained as text).
So, what do you guys think? Tell me!