He's a versatile offensive player and he does some good things from that low spot. I think his ability to make a nice pass would yield better results if he was making those passes from places on the ice where he was also a threat to score because goalies have to respect his shot. I hate how static the PP is with everyone glued to their designated spot.
I'm no expert, but I'd like to see Hughes and Pettersson be more aggressive and challenge penalty killers 1 on 1 and do a little more roving around. Ideally they'd get the defenders confused and running around a little more and when they panic and collapse to the net you have Boeser and Pettersson open up high and Horvat or Miller jamming the net.
I've always wondered whether power play structures stifled or promoted offensive creativity. My gut feeling has always been that when you've got the horses (like EP and QH), then let them run. Playing good defense is hard work: a static PP set-up makes it easier for the defenders, IMO.
On a related note, it's one of the reasons I felt the Sedins were less effective at a 4-on-3 PP than the usual 5-on-4. It was more difficult for them to confuse the defenders with Sedinery because there were fewer options to confuse them.