Completely disagree.
After the bullshit "mechanics" leagues of Betrayal, Synthesis, and Blight, Metamorph is the type of shit they need to return to. At the end of the day, this game is all about killing shit and watching lootsplosions. Metamorph is a perfect return to the "simple" side of PoE. Run map, blow up mobs/bosses, use their parts to create a final lootsplosion boss without much thinking involved. Sure, you might be searching for rare jewelry instead of currency and take a few extra seconds to swap around body parts. However, Metamorph gets us back to "kill shit, collect loot" that PoE had been missing for the past several leagues where it took countless YouTube videos and spreadsheets just to understand wtf was going on. Hell, even Delve, for as good as that league is and was, still required some YouTube watching on my part to exactly understand hidden rooms, darkness resist, etc.