One more vote for more glass - You've got the telephoto and walkaround prime covered, but not so much for wide/ultra-wide or a normal length zoom.
I'm not counting the 18-200 as either of those, sorry. If you're going to upgrade, you'll need better than that. Maybe a Tamron 28-75mm, or one of the 24/28-70mm variants?
Also, if you go for a 5Dc, all but two of your lenses are rendered useless on that new body. And on top of that, I don't think you'd get much from upgrading unless you either wanted better ergonomics/build quality (xxD series and above) or a full frame sensor. The T2i's sensor is very powerful. As they say, lens before body.
(Also, anthony was making a pun on your spelling, gripe vs. grip)