I'll need to give tiling another try, I started using alpha 5 back in January and there were some pretty nasty bugs in tiling mode back then that made me think maybe a memory leak or something. After 15-20 minutes performance would get horrible until switching back to floating, though I'm fuzzy on the details.
Is there any capability to leave an open space? Honestly, I like tiling more for the orderliness above and beyond snapping than the dynamism. Aaaaaand that's reminding me why I was looking at building out a LabWC environment, it has configurable snap zones.