The only time CGI in live-action is acceptable to me is if it is COMPLETELY IMPOSSIBLE to pull off a particular stunt in real life, or for kaiju/creatures/etc that a costume could not be made for due to non-humanoid characteristics. Also, in some cases for things such as abnormal settings, spaceships, and certain special effects that pyrotechnics can't pull off. There's many good uses for CGI in live-action, but it should be kept to an absolute minimum. Save CGI for CGI shows/movies; when I watch live, I WANT "LIVE", DAMMIT! :shakefist
I'll also jump on the GARO bandwagon for best use of CGI in toku, although I do believe they used it a bit too religiously.