I played the UT3 beta demo, and I love the feeling of that game.. even though it was not the finalized version. It still had the right look and feel, the weps were spot on.. just felt right.
I played the QW beta for a long time, and while I liked it at first, within a short period of time I was rather "blah" about it. It had too many issues that I knew needed to be addressed, and I mentioned them to the devs, but just like my feedback on Tribes:V.. it went ignored. Lots of people had great feedback and we called the low numbers. Now I read about the issues people have and why they aren't playing any more, and they are spot on to my comments previously.
Now I look at the gamespy top games and QW is not nearly where it should be at all. It's ranked 15th, just behind the Halo demo and SoF2.. wtf? The publisher/dev/game name alone should put this in the 5-10k range.. it's barely visible at 1,338 players. That speaks VOLUMES.
I wouldn't even say QW is complicated, as for all the features it has, you can wholly overlook them and still win. I won't get into all of my personal feelings, but I will say that the features of the game, don't match the mechanics.