The problem with third party sources is that it doesn't have the same level of balance and quality reassurance that first party material (should) have.We already have all those, unless you don't consider third party sources to be "real". A collated list of the best 3rd party material is better crunch than anything in SCAG, VGtM, or the UA articles.
I also don't think 5E needs anything and overall, the core classes do a great job of providing a variety of archetypes. There are 2 "hybrid" classes I'd like to see though:
- Caster with druid spells and nature abilities but no wildshape (Shaman)
- Melee warrior with bardic-esque inspiration and tactical team-based abilities but no spellcasting (Warden)
Sure, but a quick purview of some of the more popular options will find plenty of stuff that's balanced enough. I can think of at least 10 classes I've looked at from a combination of DMs Guild, Reddit, and En5ider that are balanced at least as well as WotC material. The problem is we as a community aren't pushing this material to each other to make sure it's being recognized.The problem with third party sources is that it doesn't have the same level of balance and quality reassurance that first party material (should) have.
Since there are UA's with wizard and sorcerer subclasses that can draw from the cleric's list, it seems like it wouldn't be too hard to make similar things that draw off the druid's list, which I am hoping WotC will do at some point.