As someone who was Merkley's biggest fan when he got drafted, I seriously doubt he will ever be as good as Matt Benning. I've watched him now with 2 AHL coaches and in the NHL, he's just not very good unfortunately. I hoped after last year he might actually learn how to shoot, but that hasn't progressed at all IMO. Hopefully Colorado can get more out of him, because it definitely wasn't going to happen in SJ.
Also, Kniazev (who kinda sucks too) has almost a .5 ppg scoring rate (13 points in 33 games), is a better skater, and is a better defender. Playing prospects like Merkley over players who are actual NHLers is how you become the Coyotes or 2010s Oilers.
Seeing Karlsson under Quinn vs Boughner, I am extremely dubious of any argument that Merkley, or any of our more creative or high risk/reward prospects and players, have had any real chance to shine on this team under his tenure.
Karlsson has finally been freed to play his game, one of extreme mobility, fluid movement and positioning, high risk/reward passes and plays, and most importantly his teammates have been coached or allowed to adapt to that style. Long gone are the days where the Dman just has to sit his ass at the blue line looking for one timers and shots for tips/rebounds. The forwards are prepared and coached well for when any of the Dmen, but most noticeably Karlsson obviously, skate the puck up the ice, or find themselves behind the net in the Ozone, unlike under Boughner where if they did that and turned the puck over trying to make a play it would be a guaranteed odd man rush the other way.
So with that in mind, I think Merkley, and probably a couple of our other prospects would have been far better off playing under Quinn this season and not in the AHL. Simply due to the system Quinn runs, and the freedom he allows for fluid and creative offense.
Also the AHL coaches he has been under......A dinosaur that has never to my recollection actually coached a "creative" offensive player into the NHL, and now a rookie coach that has coached some of our best prospects to the 2nd worst offensive output in the AHL, a bottom feeder record, and a defense that is in the bottom 10.
Just look at Kniazev as another good example since you brought him up. Seemed initially to have a wonderful chance of being a good skating, puck moving, offensive 2 way Dman, and now by your own admission kinda sucks. He regressed, Merkley has struggled mightily offensively under those coaches, Bords and Eklund cannot even crack the top 50 in points in the AHL, on and on. No one besides plugs and face punchers has graduated from the AHL recently. Now maybe all our picks and prospects were just trash.....I prefer to think our coaches and systems have been rigid, unimaginative, and not conducive to offensive output for quite a while now and that is screwing all our prospects up instead.
Lastly you become the Oilers by building a horrible team, trading players like Hall for Larsson, signing players like Lucic, and a LOOOONG list of other trash, to horrible contracts, never drafting or fixing the defense or goaltending etc etc. Playing their top prospects in the NHL has never been the issue in EDM. You clearly do not watch EDM if you think that has been the problem there. In fact EDM playing their best prospects is the ONLY bright spot in EDM during the last 10+ years before finally making the playoffs recently.
Hell even now they struggle to make the playoffs with the best player in the world scoring on a pace that hasn't been seen in multiple decades, and another of the best players in the world. It certainly is not because they are playing one of their top prospects (Holloway) on a nightly basis, or have Broberg/Bouchard in the lineup. Its because Nurse is still the best Dman they have, and he is mediocre at best, and their goaltending is average on a good day. Those two issues, defense and goaltending, along with overpaying horrible vets/depth, have been present the ENTIRE time that EDM has been bad/struggling to make the playoffs. Not over reliance on prospects.