In my honest opinion this is a sad attmept to make Brawl into Melee, even though they deny it. That's my opinion this is a waste of time, just play BRAWL for what it is, Melee was different from 64. so why do this? why waste time? Please I honestly want to know, its not bash the people who made this but honestly.
It's actually got a bit in common with brawl. DACUS, RAR, Glide Tossing, and a few other mechanics exist in P:M that aren't in melee because they were the few good physics additions that Brawl brought. There's also the fact of many new characters, and more stage variety. Those are all things you can't get by just playing melee.
But if you don't know what you don't get by playing Brawl, then maybe you should go find out. You don't get character balance, for one. You don't get fast paced, highly technical gameplay, that's two (and a really big two). You get tripping. I guess if you like tripping then that's okay. You get broken recoveries on top tier characters who already deserve high tier otherwise... So it's not quite trying to make brawl into melee. It's trying to make the physics engine into melee's physics engine, sure, and a few top tiers from melee will be almost identical (imagine that, that good characters might not be completely changed between games! Revolutionary...). But other than that, this game will be quite different from melee.
And stingers, replacing his fair isn't the only way to give him a new forward facing approach option. That's not what they did with DK, and good thing too. DK also lacked an insane wavedash. Not that I'm saying that the wavedash makes up for it, but they did fine without completely overhauling DK. In fact, the only move they completely changed was his dash attack. Everything else recieved subtle adjustments. I could support M2 having a new dash attack. I think his was even more garbage than his fair by comparison to other characters. Or perhaps a new nair. But his fair DOESN'T have to be replaced to give him a good approach. Besides, what would it even be? His arms and legs are too short for it to have good range, and having his tail have a fast fair would look awkward spinning in the air like his dtilt (although I suppose it could be done).
As for his usmash... yeah that needs some fixing lol. The shadow-energy animation thing lasts forever after the hitboxes end, and with small hitboxes to boot. Or maybe a new uSmash, I suppose I could get behind that.