It is a finished product in terms of what this thread is about, infi-OD. On Shadow's server thats what we have, and it's fun to zoom around forever but it makes CTF pointless and unplayable. You think regular rabbits are bad, try catching an OD-Rabbit.
Assuming that this idea isn't insane to begin with (that's another debate), OD rabbiting could be stopped by only being able to OD for n seconds (say, 10) before the flag is dropped.
I've both run and joined a few servers with the invulnerability glitch and infinite OD is fun. How useful that is on a CTF server I don't know, but I think it's worth fiddling with a couple variables to find a good mix. You know, stuff like adjusting how much health it eats, the force it provides, minimum speed required to continue to OD.
If OD allows you to shoot straight up for 30 seconds, that's probably going to unbalance things.
If OD is overall weaker but allows for fancier maneuvers to throw off chasers, that might be fun to play with. Then it won't allow for someone to change direction AND zip off into the distance as easily.
I wouldn't go as far as unlimited OD, because at that rate everyone will just be cruising like an airliner. I'm guessing the snipers would get a kick out of that, though.
I don't know, I just want a content update. I'll even take bug fixes only (ally1, cough).