Obviously you unreservedly changed your mind in the interim. So what were they showing you back then that morphed so spectacularly into something you couldn't support?
Lots of promises about how robust and fair the new OGL was going to be, for starters. Also lots of stuff about how the game was going to make the DM's job easier, etc.
But we never got the new OGL in time (and it fell far short of expectations) and we never got a look at the rules before they came out in the store. In the end it was pretty obvious that WotC wanted to take a "go it alone" approach to the edition, so that's what we let them do.
--Erik