I have just released TotalTerminal 1.5 on pre-release channel:
This fixes Yosemite “shell corrupted” issue during launch. I did lot of refactoring and code cleanups. I don’t think I have fixed the keyboard shortcut problems. I was unable to reproduce it on my Yosemite DP4 systems. At least I have reimplemented double-tap code, which could help.
Please report back while I have it my head. I will try to improve 1.5 with additional several releases over next few weeks.