I think that REG should be the 11th Doctor after David Tennant - isn't it about time for a slightly older, more refined Doctor?! He is so incredibly perfect for the role...
Yep, the BBC *beep* him over good, but then, they always *beep* people over. This is no longer ''Canon A'' (e.g. the line of Doctors we have been following on TV) but he does exist in ''Canon B'' (a different dimension in which the Richard E. Grant Doctor exists instead of Eccleston) because the BBC was so thoughtless and uncaring.
Well, the BBC only use DW for profit. Infact they stole the franchise away from Virgin, a company run by a man who loved the show and wanted to save it after it was canceled, and then had the cheek to try and de-canonize the Virgin novels! The BBC are just money hungry suits.
Infact, the revived series was just a project for Russell T. Davis, the BBC didn't care about the show; this is the reason the budget on the latest season was cut.
I do and don't, sadly, unless I can. Actually, I pretty much just retcon contradictions in either so, yeah, I take the better stuff in the NAs. 'REG', I do not think of as canon in the sense that it is the universe that the series follows, regardless of anything better.
The whole concept of canon is pointless in my opinion. If you want to consider Richard E. Grant as an official Doctor no-one can stop you. A series with a storyline as flexible as Doctor Who makes virtually anything possible with a little tweaking.