I hope they nerf legendary items which are currently OP and it affects all new and current legendaries.
ie, Manticore no longer has 2 sockets, any with 2 currently are replaced with Thorns.
Manticore gives up one of its affix rolls to get that second socket (it's guaranteed to have at least one baseline). That means while you can find a single socket Manticore with LoH and Life Steal, you cannot find a dual socket Manticore with something other than Lifesteal (or your desired affix). In addition to that, despite being listed as a two-handed weapon, it rolls one-handed stat ranges.
So in effect it really isn't as overpowered as you think. It's just that it simply outclasses everything else the Demon Hunter has available because the other legendaries are lackluster and rares cannot roll two sockets or the affixes that are currently Legendary-only.
And if you factor in the loss in effective DPS (eDPS) that hunters endure compared to melee due to having to move so often to reposition themselves, Manticore looks even less overpowered.
Manticores were designed the way they are taking the whole picture into account, not just a narrow vision that might make it look overpowered when it really isn't.