Yuuka, Mugetsu, and Gengetsu can all teleport, though of course it's not their main gig. Komachi does a teleport like thing as well in the fighting games. Also, a note on time/density manipulation. You can view time as the relationship between space and speed, and from that perspective, it would seem to be impossible to manipulate time without influencing the other two. Getting into the physics, time is just a function of space and speed, and by rearranging the equation, you can get space as a funtion of time and speed, and speed as a function of space and time, so it makes sense that controlling one variable gives you some control over the others. Komachi (using distance manipulation) can make a pink pillar in the fighting games that slows the enemy's horizontal movement. The idea is that she stretched the space in that area, but the effet is essentially the same as creating some kind of time slow-down. Similar logic can be used for Suika affecting gravity.
Anyway, powers that I'd like to see:
Plant/fungus manipulation
Using games as danmaku (Chess pieces, playing cards etc. kinda like Flandre's Kagome Kagome)
Math, or another science character like Rika or Rikako