Just giving that many IP is, I think, bad. With that many, you have absolutely no reason to conserve -- you've taken the "management" out of "resource management". The class isn't supposed to be "hey, here's some cool shit to do". It's about resource management on a shoestring budget.
Also, 31d6 sneak attack is bad.
For my games:
-- IP progression changes to match that of a Good Save (that gives you 2 extra -- 1 at the front end and 1 at the back end),
-- add INT bonus as a separate /day pool,
-- FoI is completely different: gives you 1 extra out-of-combat refresh of your /day pool. Can only be taken once.
-- magic item: Well of Inspiration: provides extra IP via "charges", refreshes 1/day. Priced according to # of charges = 1k*#^2 (max 10)
I mean, nobody in my group gives a damn regardless; but all have admitted that if that type of character happened to interest them, then it just might be workable.
Sorry, I otherwise am rather bored by the class in contexts other than gestalt.