The oxford fleet of Seneca's is indeed old but are very well maintained and from my experience rarely encounted problems.
I can't offer much help with FTE but know that sucessful students have the same prospects as those from Oxford. Again I don't know what FTE use for MCC/JOC but the 737-400's at Oxford are only FNPT 2's and not full 737 flight simulators, its makes no real difference as the course is only intended to teach CRM.
Up to the point I graduated problems still arose over the flight training in Goodyear, this was mainly a standardisation problem amongst the instructors. I found the IR training back in Oxford was top class!!
I've always been keen to recommend Oxford from my personal experience