Naismith may have been good for Everton but going on his three and half years with us or should I say Hearts (where he went on loan for quite a bit of the time) he was a major disappointment and cost us not only £9.5m in transfer costs but millions in wages. For a club of our size that was a major cost for practically nothing.
Sorry but I've got to say it as it was.
As for Walker, he did a good job for us and then decided he couldnt stay working for our Chairman. As he said in a BBC programme (its on youtube) he had a difference of opinion with the Chairman as to the way forward regarding the team. He left and then he's working at Everton. Its up to the you as to what you think of Walker's management of the Everton team, feel free to express it.