I think it depends on what you expect out of him when you watch him. If you're hoping to see an agile puck mover with an effortless stride then you're going to hate Davy right off the hop. He does have a unique, albeit awkward stride. He's not fast from a standstill, but he has good gap control and positioning that he rarely gets beat due to his skating. He's not a great puck mover, but a competent one who doesn't panic with the puck in the defensive zone. He's incredibly strong and proficient at breaking up the cycle, he just out muscles and out works guys and takes the puck from them. He's also pretty damn good at playing guys off the rush and either funnels them to the outside before using his physical game along the boards, or gets in their shooting lane.
Right now, I'd say he's a good bottom pairing defensive D. He does have a cannon of a slap shot, but he doesn't get to utilize it enough. Before injuring his knee in 2015-16 we saw his progression from a healthy scratch to a guy who was playing flawless defence for 20 minutes a night. After he mastered the defensive side of things his offensive game was slowly starting to progress and he was getting more confident jumping up into the play. He talked about it in the past, but he likes to work on one aspect of his game until he's happy with it and then start to work on others. He's just now building his defensive game back up to where it once was, and I would guess he'll eventually start trying to contribute more offensively.
With all that said, he obviously wasn't working out in Montreal. I'm happy he's back in Edmonton because he's a great guy with a great story overcoming cancer, and the guys seem to love him in the dressing room. He's also a rock defensively and thats something we needed on this d core in a 5-7 role.