Well, there are a few test servers running (i know of .de Greens, lazy dog and galts) basicly you can join with 2.4.2 and will download some extra files you need. Of course stuff like engine fixes or the new menu can't be downloaded like this so you will miss out some of the changes but at least the new weapon settings and such can be tested.
Beside i really think people should test the new settings before complaining, given the complains about the RL were not by noobs but some of the more advanced players and the changes were not as huge. Still, please TEST the RL and the crylink and report back!
The Port-O-Launch is more intented for the new race mod or special maps that include it explicitly. Guess its more fun to put a map similar to portal in the singleplayer campaign then in multiplayer games

. But the portal is just stable for a while unless its used regulary and by default each player just gets one shot, both of which might be interesting for teamplay.
The new portals are special and different from teleporters but with the new version you can make own portals to use instead of the teleporters so you can also shoot rockets through..