Like someone said above... there are expectations everyone has of fowler... and everyone has slightly askew expectations.
Remove them, and you have a young dman, defensivelly responsible, offensively and skating skilled. He mostly makes smart decisions. He was rushed into the league, and has played as a top pairing guy while learning the nhl game.
Who could ask for more?
You can knock his point production and his occassional bad mistake, but if you remove the dreams of him being scotty jr or wish he was flawless, you would be thrilled to have him on your team.
All that said, he gets a few less criticisms because of people wanting to see him succeed.
He is not offensivelly blesseed with shooting smarts. He has all the tools, he just isnt ever a guy making great shooting decisions. I think that its part of his game that will improve, but he is not an offensive juggernaut.
Just comoaring him with vats, and vats being able to wire the puck, make smart passes, and make efforts keeping pucks alive... he isnt at Vatanen's level.
That being said, 6 fowlers would be a better defenive core than 6 vatanens.