No, Moyes was good for us for a long time but he'd stagnated by the end. We were by no means playing horrid football, but I'd rather watch us now - it's more exciting at least!
Martinez has a lot of qualities, but unfortunately, bar his 1st season with us, it has to be said that defensively he is just not up to the job. Personally, feel we need a bit of fresh blood in the coaching department/behind the scenes, more than a new manager.
Peter Reid would be my choice to draft in as a former ex player (as Martinez did with HK (RIP), JR and Ferguson) to instil a bit more bite into our set-up. He also needs to realise that his stubborness is costing us dear in regards to Howard - who is now hated by the fans unanimously and is not trusted by his teammates - and his insistence of sticking with a style of play that doesn't work at this level (e.g. playing around at the back, rather than playing our football further up the pitch).
If he were to leave, which I don't think he should or will, then it has to be this summer for me, and I'd go for Flores from Watford, who has the defensive side of the game down to a tee.
However, Martinez has done a lot of good for this club, and that shouldn't be forgotten. COYB!