This is a genuinely good contribution to the forums. I have to disagree with you, not your premise, but your argument.
Malthael and Deathwing are both quite balanced and they do compete against Hogger/yrel. Pretty sure malthael beats all three in the offlane and he can certainly double soak better than all of them. Deathwing also provides alot more spell damage in teamfights than the other where as malthael is single target, yrel is tough survavabilityk, and hogger is the backline harassment.
Murky has always been a trollpick. Slightly underpowered but still very much an acceptable pick. especially when there needs to be a double soaker.
lili is also a beginner healer. low risk low reward. I think she can be okay as a single healer but its always a bad idea unless enemy has alot of melee aa that suffer fromblinds.
I think the premise is still right though. Ana is undertuned for the rest of time, thrall has a niche but is still just below meta, a ton of mages will unlikely see higher level play. Arthas is a meme tank in many circumstances, butcher is a slap in his team’s face.