I'll echo the OP's opinion and drop my unsolicited take here. I picked up a 22/23 Mercury 156W this summer and then hurt my neck before I could take it up to Timberline to test it out. My neck is better now and early season in Idaho has been good, so I've gotten to take it up a few times now. I really, really like it.
For context this is my 24th season (with life gaps), and I owned what I think is the ancient ancestor to this deck, the 03/04 Capita Photography(?) series, which was kinda Tyler LePore's project IIRC. Just a mildly directional, medium aggressive AM deck. That morphed into the Totally Awesome, which became the Totally FKn Awesome, which got toned down into the Mercury (maybe the lasers coming out of topless skier ladies' chests wasn't a hit with parents).
I worked in the snow industry from 2008-2012 and got to demo a Totally FKn awesome in 2011 and loved it. It was aggressive but weirdly playful too. Absolutely has the teeth and the jaw muscles when holding a carve but will cuddle up when it's time to slow down and snipe some side hits.
Having taken the Mercury out a few times now, I can say for my tastes, it is my favorite board I've ever ridden or owned. But I can see how some people don't dig it, especially the Death Grip bumps. I personally love it and for me the benefits outweigh the drawbacks, particularly when encountering unexpected firm snow/ice or needing to drive a last second turn. But slowed down or cruising along cat tracks, you do have to pay a little extra attention to your edges as you can feel the Death Grip bumps try and engage, along with that deep base structure trying to straighten you out. It didn't bug me though. This is the first board I've ever done zero detuning on, and have no intention to do so at this point.
I don't go wild with butter tricks and of course a softer deck would be better for those, but there are worse boards than the Merc. Again with the Death Grip, I really like getting the edge to engage and stop the rotation when landing cutty little spins. I think it would be a significantly less worthy deck for mini-tricks if it weren't for the rockered nose/tail. At the same time, I've already landed shitty a few times and DID NOT get slammed like I probably deserved. The aggression/forgiveness I've experienced so far is a tasty combo.
Lastly, it's not too bad of a switch rider and the side hit back 1s on it seem pretty steezy.
TL;DR Cool new age all mountain ripper. I love it but would suggest trying it first.