The hook is almost never enabled on "serious" CTF servers (or other modes for that matter), mostly because it completely changes the gameplay. Instead of CTF, it turns into Spiderman base jumping, which most of us agree is only fun for a few minutes.
Part of the reason is that the hook has extreme range. My idea is to add a var to limit the maximum hook extension. Maybe we could even make it faster, give it a short distance, and set it as the laser secondary fire. When I say short distance, I mean maybe just up to the flag platform on egg&bacon. I could imagine it complementing the laser and being a lot of fun without ruining some maps the way the normal hook does. You would be able to both push and pull yourself around.
Changing it from a "hook" to some sort of tractor beam to fit the weapon would probably be easy and make more sense too (it's just an ugly white line anyway, right?).
This could all be configurable so that the Herforst "Let's play Facing with hook for 5 hours" Elite aficionados would still have their hook.
The other idea, while we're on movement... I'd like to see the Warsow special movement key in Nexuiz (maybe tweaked to suit Nexuiz instead of a direct clone, but wall jumps and dashes would be amazing).