Few things have come to mind with regards to free-for-all since that's all I've played from yesterday. I feel that there are couple of aspects that can be improved on. These are just some thoughts, of course I'm not sure how much work it would be involved to implement these.

Game play:
- Animation for bomb can be changed to reduce the "lag" it creates. I know it is a "wave" effect but still...
- Let players keep upgrades when they die OR let them keep up to a certain point let say if you had all 3 then you keep all 3, if you have 7/3/4 then you'd have 3/3/3.
- Keep revive time consistent.
- IMPORTANT - Flashing players (just revived) should not be able to place bombs. They are able to walk across bombs to avoid being trapped, but they are able to trap people. I don't see how it is fair.

Rank Scoring:
- Score is not scaled for different number of players ie. 8 players score is much higher than 4 players. I'm pretty sure it's already considered but I think it's important to emphasize it. Kill / death should be taken into rank score calculations such that the top ranked player is not just most played. I think it should be (kills - death)*3+score. Even though score is sorta like total kill and death count. So my 14/0 would in 4 players wouldn't just yield me 40points...

I'll add to it when I think of other things. Am terribly tired and rather frustrated.