Here's a partial fix for the stallers problem: if a player has only one card and no pillz, the card is played automatically (and immediately) by the game. Doesn't completely solve the problem, but it'll help and should be relatively easy to implement.
I'd like a separate ELO-format DT room that does NOT affect your ELO
rating (like the ELO-format Survivor
room), which should reduce the number of slow players in that room. It also means that there is a viable DT room where you don't meet Jackie every other game.
As someone based in Asia with a somewhat slow connection, I'm not in favour of arbitrarily shortening the time allowed; as it is, there have been a few occasions where I've made a move with more than half the time bar remaining, but lagged out to incur an undeserved -20 penalty. This has happened to me few enough times that I can accept it as a consequence of unfortunate geography, but if the time allowed is shortened too much, people like me may lag out so often that UR becomes unplayable.