some ideas for both sides, humans and aliens. nothing really added.
HUMANS:
1- wepons (_all_ weapons) can be modified in armory to have a faster OR more powerful shoot. the full damage/time remains the same.
2-nades-launch: as I posted here (the 5th post):
http://tremulous.net/phpBB2/viewtopic.php?t=4352nades have timing, can be launched further... just look at the post

ALIENS:
1-aliens can be changed at spawn-time for a faster-hitting OR more powerful alien. just as #1for humans. after spawn you can change your hit-speed/power with overmind.
the speed/power rate is the same.
2-biles dretches can be blown up immediately with mouse-key-2 or with a 5-10sec delay if you press mouse-key-1.
BOTH:
1- at spawn time you can set your speed/strenght. so you can have slow-but-hard_to_kill-dretches or fast-but-easy-killed dretches.
this setting is decided ONLY at spawn-time.