Investigator? We have this already - it's a Rogue archetype.īloodrager? It's a Sorcerer/Barbarian fusion subclass. Warden? Without 4e's mechanics to really help make it feel unique, ultimately, this is a Druidic version of the Eldritch Knight Fighter. The Gish archetype? It's not quite as satisfactory as 4e's Swordmage, personally, but between the Eldritch Knight Fighter, the Bladesinging Wizard and the Stone Sorcerer, it's covered. Shaman? A Sorcerer that "dabbles" in Druid magic. Oracle? This'd be very hard to make different from a "Cleric-dabbling" Sorcerer subclass, ala the mk2 Favored Soul. Summoner? The Conjurer already exists and is focused around being excellent at commanding summoned minions how would this honestly be any different?
Heck, I'd actually be kind of interested in a Hexslinger warlock or a Holy Gun paladin.
At best, we could get some gunslinging-archetypes for more guns & sorcery campaigns. Gunslinger? Take an Archery focused Fighter, Ranger or Rogue, give them a gun, let them make ammunition with an Int check and access to the raw materials, and you're done. I mean, honestly, what class concepts are there left that would actually warrant being full-fledged classes? And, really, unlike in, say, Pathfinder, 5e's subclass system is crunchy enough that it actually does nullify the need for a lot of extra classes. That's why the Artificer was originally broached as a Wizard subclass, after all.
The problem with adding new classes is that, really, WoTC seems determined to focus on subclasses first and foremost.