Firstly; some extra functionallity on /kills and similar commands.

On /kills it'd be cool if after it tells you your kills and deaths it also calculates your K/D Ratio for you, to two decimal points.

Would be nice if there was a /wins command that tells you how many games you've won and seperates them into gamemodes eg:
Games won:1000
TNTrun:200
Spleef:100
FFAPVP:100
CTFPVP:200
TDMPVP:600

would like for a /captures flag that basically tells you how many flags you've captured, just as a thing for those who go for flags not kills as they suck at pvp.