It's amazing how quickly Gaz has managed to destroy ~11 months of goodwill from making up for one of the shittiest launches in the industry since AO.
Though to be fair, I don't even really give a fuck about the Omega System. It's a bloated mess that has had everything interesting in it turned into +0.01 Gooder (or worse) like the rest of the boring nodes. I don't want to do the equivalent of a legendary from rank 4 to 5 every day for the next year, and if the system was actually really strong I'd just never consider coming back if I was 5000 points behind the cap.
What is driving me away is the fucking loot, just like Path of Exile did. PoE still has a lock on "stingiest loot system created by mankind" but MH makes up a lot of ground by having nearly 40 heroes now and making it ungodly time-consuming to fully gear even one of them. Gaz fucking up right and left the past few weeks, first by making mistakes and then by trying to cover them up, just makes it that much harder to hold onto to any hope that they'll get their shit together with the really important stuff.
It's really quite extraordinary, and this rubbish with the Omega System, stealth changes, rushed hero releases/reworks (IW & Wolverine for example) has only served to give me the final push I needed to go and play something else.
I've had a ton of fun though (~30 heroes, two fully geared with blessings, maxed leg., well rolled uniques & arts. etc, but was getting bored with terminals). Since I've no interest in raiding in this game, the thought of grinding it all out again with several other heroes (as you mentioned) just makes me want to puke. So, I've started out totally from scratch in RoS, and having a blast so far with my Crusader; will see how long the fun lasts I guess =)
Funny you should mention PoE; I quit last year with a couple of character in the mid eighties, after sinking several hundred hours also. I played fully self-found so yeah, inevitably the shitty loot was the final straw there. I check the forum every couple of months, and the "feedback" posts have hardly changed in all that time - crap loot, map currency sinks, "forced" trading, and de-synch... lol
re MH, I'm not sure how Gaz will proceed. Once you are cruising through cosmic terminals, there really isn't much of a carrot left, especially if you play mostly solo like me. Some have been begging for a Cap-level story mode (with appropriate loot) for a long time, and if they did that -AND- made it possible to dial in your own difficulty setting (like torment in D3 I guess?), I think it might add a much needed layer of variety to the end game.
I've kind of stopped caring really, so for the foreseeable future it's probably too late for me anyway.