He had injuries but his main issue was just being a dumb hockey player, never could tie up his man in front of the net, bad pinches, horrible positioning...he just tried to play above his skill level and got burned from it making the same mistakes over and over.
Being slower than others makes you look dumb on TV. The NHL goes way too fast. I have played in different levels of amateur leagues (being european and coming in NA at 11 y/o, I started hockey late and started goaltending on the ice only in College), and at each level you see a clear difference. Now imagine the ECHL, then the AHL, then the NHL. That league is filled with the fastest/best players in the world. Even 4th liners are ultra skilled compared to the best players you have played with and against. I have seen Georges Laraque skate circles around some pretty good hockey players. I played against Burrows in a very competitive cosom league (there was guys coming from the QMJHL in that league) before he was even signed to the NHL and he wasn't allowed to shoot. Even then, no team had a chance against him.
Jared losing that mobility sank him, and since decision making wasn't his strenght, he just couldn't keep up. You have no time to think. If you're slower than others, you are going to get overwhelmed. Put any good hockey player you know that you would think is "pretty smart", and he would look like the "dumbest" player that ever laced them up in the NHL. lol I remember that guy who was maybe the best lplayer in the league, I invited him to play in another league who was a level higher and he couldn't keep up. Guys told me "I thought you were supposed to bring a good player"
Cowen had to reinvent himself as a pro hockey player but pride got in the way and he didn't. A hockey player's body/brain is his toolbox, like for any athlete, if you downgrade some of these tools from that toolbox, your reality changes. There's a million of examples through all sports.
It's also a similar problem for Ceci, not his mobility because he has great tools but his decision making isn't good enough to dominate (because you need to dominate to be good in the NHL). The most successful players are those who are just natural and play with instinct. They know where to be, they know where the puck will go and where their teammates are/will be. It has to do with spatial awareness and sense of anticipation. I suspect Ceci is not capable to rely on instinct so he is relying on his decision making that isn't a strenght.
You can also look at EK, sometimes he will look pretty "dumb" on the ice, but sometimes he looks like a genius. It could be that his instinct fooled him or served him great, it could be that he was overthinking or tried to force a play that wasn't there because he misjudged the situation. People need to take in consideration the NHL PACE. The speed on the ice vs what you even see on TV : no time to think, plenty of ways to get fooled. It has NOTHING to do with being smart or not, it's like I said related to spatial awareness, anticipation, decision making, etc. You could be the smartest man on earth and still suck at these things.
But maybe people are right, all I'm saying is just non-sense and "dumb" is well enough to understand all this
The topic was about how he preformed in a Sens uniform. He sucked in all his years here.
The first post I quoted was "Was never good." so I started to answer on that.
And you can say/think what you want, but there is going to be people who differ from that opinion, and not only before his NHL career, but also on his rookie season.