Laugh at terrorist voting no.
There's really nothing bad that could come from this there's no reason to vote no.
A few things would completely needed otherwise it wouldn't be worth it:-A clear way to have timing that is used in exactly the same way on every map. Maybe something like a semi-transparent block that you have to pass through in order to finish the level, and simply having a movement key being pressed to start the level.
-A universal scoring system. This is really what makes the q2 servers so great. Times on individual maps don't mean much without an online, or even in game way to track who is doing the best overall.
-Those two are the main things to implement if you made it, but things like being able to view replays, storing points in the map, and being able to have admins modify maps while in them if there is a mistake.
it would be cool to have something like Trackmania where there would be both individual and team-based racing modes.
The team based scoring would a cool way to separate from the quake 2 jump mods that exist already. You could have a separate part on dplogin for a jump group, or just use your existing clan. I think a separation would be ideal though.