He has pace and enough strength to play out his role adequately. His crosses from the right are top notch. The only problem I had with him was that he was a little clunky in dribbling
I eventually decided to test out FOF Valencia. I found that Valencia is a better dribbler and accelerates faster (he has faster acceleration stat). Valencia also has better workrates H/H which means he actually tracks back a lot more than Walker.
So for me TOTS Walker remains a great buy and is the second best RB In game.
H/M Workrate leaves him exposed at times