Ext 2 Fitzpatrick is alright, particular the latter half e.g. mechanics and the likewise, from about chapter 4 onwards (the first 3 chapters are rubbish in both versions. I wouldn't rely on the complex numbers section though as it is still bad, use Coroneous or even Terry Lee for the questions.).
It is an improvement from the old version, although I suspect it has been diluted and easier (as I have said elsewhere)* As a result wouldn't recommend doing the multiple choice questions either. (And I don't trust how the new ext 1 does mathematical induction either). Most of the questions however have been fixed from the old version and there are still mostly there without the errors that the old one sometimes had.
From school, I personally had the new Fitzpatrick for Ext 2 and the old one for Ext 1. The old Ext 1 is still very good in my opinion and still a top textbook for extension 1.
In the class I was in, we only used the older Fitzpatrick over the newer one in one instance only (even though the latter adds some diluting questions), and I suspect it was a couple of really good questions that got cut
But apart from that, yes, wouldn't recommend the older version of Ext 2; use the newer version, haven't seen the newer Ext 1, but the old Ext 1 is very decent stuff (Fitzpatrick Ext 1 + Cambridge and you are set for Ext 1), for Ext 2, NSM is probably your third or fourth best option, although I do like its summary thingy at the end, for notes/revision I'd recommend Patel (not for its exercises), which I like the format of. Terry Lee and Coroneous are the only two options better (not sure about ext 2 Cambridge as I've heard mixed reviews)