If I do a search on steam, I get 471 games flagged as a “moba”, though the actually listed gets diluted because steam is trying to use their algorithms to predict what games I would play/buy instead of just showing me options limited by that flag.
Many of those are going to be cheap clones, others are probably not going to suit a “moba” flag to you as they try to mix-and-match other genre features to set themselves a unique niche – since smite has the first-person perspective (and started their sequel) some try to blend overwatch and/or fortnite, but with minions and lanes into a ‘unique’ game.
“Moba” sees more iterations and ‘success’ on the mobile platforms, and while as a ‘purist’ that might not suit you, these are made to make money, not serve as some artistic statement that only stands out if it happens to have a specific skin for people to digest the content.
“Moba” as a genre is terrible, and while it stood out as being a ‘new’ genre in ‘recent’ decades, a lot of the attempts to get into it have dramatically and quickly failed as the perception of a “moba” requires a significantly larger playerbase to sustain the game that are willing to actually play the game.
Blizzard might have a unique niche toward attempting a “moba” but it’d either have to be as a battleground/dungeon within WoW to make use of the existing playerbase and resources, or they’d have to carve out a ‘unique’ genre and redefine how the game is played to suit smaller matches.
If they were to repackage their RTS story telling as a series of pve moba mini-maps, then they could sell a “warcraft 4” that then has “moba” pvp, but they’d probably have to build the game around have 1v1, 2v2 and/or 3v3 matches.
Instead of needing 10 players to occupy 3 ‘lanes’, they’d have to consider having 3 players, or 1 player controlling 3 players and build a game around something akin to how TLV and/or rexxar plays toward something a bit closer to Warcraft 3 in having ‘units’ and resource management, but reducing the oh-so-scary formation management of dozens of units.
If they can cut down on the needed amount of players for individual matches and have pve content, then they could feesibly create another “warcraft” game that tells stories apart from whatever WoW does with the expansions and subscriptions, so they’d be able to sell to a ‘new’ audience instead of competing against themselves with what they already have.
Otherwise, moba are just a huge cost for people that generally don’t even actually want to play them since they’re, generally, a terrible game experience.
the appeal of warcraft based characters might be nice but I don’t think it would force someone to change their play style or give up the knowledge they have put into the game.