I see there's a lot of talk about the PP so I will give the One True Take(tm)
Laine won't replicate his 2017-2018 PP sh% without drastic PP changes. 2017-2018 was the first season he was used properly on the PP and was playing in the first unit. While teams cheated, or started cheating towards him quite soon, they didn't cheat near as much as they do nowadays. Opposing teams still had some respect left for Wheeler's muffin and then there was Buff on the point. Since then that seam pass from Wheels to Laine has become very stale - every PK knows that's the play ('the play' as in about the only play...) they are going for, they also know they can pretty safely let Wheeler shoot the puck and the goalie will have no problem, so the PKs do a lot better job of blocking that Wheels to Laine lane than they used to. For the current setup to have any chance of working again, there should be a better shot at Wheeler's place - if the PK had to respect that shot, they couldn't cheat so much towards Laine.
I don't think Laine has any issue moving or finding open lanes, he's been pretty good at it until he became the sole focus of every PK unit. I mean you can always do better, but I don't think it would help with this setup and personnel, unless he moved all over the ice and then did a perfectly timed Selänne-type movement to his spot, but that would be a completely different PP setup (and Selänne perfected those on-the-sly movements). Something he could improve is his shot, the times he does get it off, it doesn't look as good as it used to - less accurate and softer. Wheels is good at dishing those puck, but I see no reason why Ehlers or Connor for example couldn't do it just as well with some practice. I think Wheeler's spot really needs a player who can shoot the puck. Also I'd like to see more Pionk to Laine and Connor to Laine passes for shots, but Connor to Laine for a shot almost never happens, and for some reason Pionk only does granma passes, which are useless. It's almost as if someone told him he needs to play it very very safe with those passes - some have speculated Laine likes granma passes, but I call 100% BS on that. Anyway, with Connor to Laine and Pionk to Laine they could improve shooting volume a lot and even Pionk to Laine would create some lateral movement and even if Laine didn't score, he could shoot for rebounds.
And as for shot, of course Laine has a better shot than Ovechkin, or at least used to have, he's a new generation shooter who has played with these modern sticks since 2 years old probably. His technique is very different to Ovechkin's. There shouldn't be anything ridiculous about stating that, but there's more to scoring goals than your shot. Ovechkin has a very hard and accurate shot but I don't think he has the kind of shifty release some of these young kids have, Laine one of them. If you gave them both wooden sticks, I'm pretty sure Ovechkin would still have a very hard and good shot, because he's a more old school shooter with a lot of raw power behind - Laine on the other hand I'm not sure would do well with granpa's old Koho.