I've been really impressed with Vlad so far, too. He can only get better, IMO. - which is why I left him out.
Walker has apparently got an excellent attitude, which stems from his childhood. One of my FA tutors told me that he used to have to get 3 different buses to training at Sheff UTD, was totally committed and often stayed late to work on parts of his game. Apparently his dad was quite tough on him and if he played **** for the academy, he'd drive off after games leaving Kyle behind to find his own way home. Walker doesn't concern me and I always feel that he actually gives a ****. As long as he's kept that attitude (which seems to be the case), I have every confidence that he'll continue to grow into a top right back.
However, we need some stability with our management. Not just for him, but for everyone!