So you had low ilvl azerite? Because I had azerite in bags from M+ sitting there with weeks worth of grinding ahead of me before I could equip it. I stopped playing because it was just not worth the time, the game wanted you to clear every world quest every day and then live in islands, it was dog shit. Now it's extremely easy to level up alts
You earn essences on your main and then you casually buy them on your alts. I have 3 chars farming 5 mask visions, 6 chars with level 15 cloak. The game removes most of the cloak quest requirement once you've done on your main, you buy essences with echoes so 7500 echoes and you've got your 3 best + the easy free crucible rank 3 (which also happens to be a good essence for most specs). The game also feeds you gear really quickly so you can get into the 440-445 range with almost no effort, which is just about enough gear to start raiding heroic, if you were so inclined.
In 8.3 the game has a lot to do but that isn't "grind hard just to equip your gear", alts are much easier to gear. If you don't have alts in 8.3 then it has nothing to do with which patch is best, because you can very easily prep alts for mythic raiding by just doing visions for your 450-470 level gear and your 1 Mythic + a week for say 460-475 cache.
Game at launch was just busted, and shit. Game in 8.3 is a game, lots of stuff to do with a clear progression path and multiple routes you can follow.