He might not seem good value to you fantasy GM's but he was in my opinion the best Buffalo dman for the last two yrs running excluding that sophomore slump of a few months. His other issue is that if he gets paired with the wrong dman then he struggles.
His offensive numbers being down are the result of Ehrhoff plus Sekera becoming a better PMD. However if you watch him play when he does play offense, he does a great job and shows tonnes of potential. He did however tend to play a very conservative shut down game last season where he would often join the rush late after his other dman partner or hang back a bit towards centre ice. However if I was to make an NHL team then Myers would be one of the 6 dmen I'd use. I think he has higher potential than other young dman in the league with the exception of Pietrangelo and possibly Subban/consistent Doughty/OEL. Would I put him top 6 in a fantasy league? Probably not.