DEATH TO COFFEELOCKS AND HEXADINS!
I suspect you will find both of these still exist, but we'll have to see the final product. The P7 Warlock is actually
more suitable for "Hexadin" than it was before, as now you don't even need to be a Warlock to get it--Eldritch Adept lets anyone pick up Pact of the Blade for just a feat (it's a Warlock invocation with no level prerequisites), and that means you can now get Blade Pact + Agonizing Blast for the price of a single Warlock dip.
Yes! My entire beef with this whole concept is that they could have added a ton of new material, and yet chose not to.
"They could h ave added a ton, and yet chose not to" is practically the byword of 5th edition entire, though. Its whole ethos has been traditionalism (meaning, 3e-ism) and avoidance of adding content.
As I've said before, I hold the fanbase responsible for this.
Once they made the decision to be consultative with the public (in theory, a good thing), they became trapped by a fundamentally conservative bunch who didn't want or were afraid of change. They offered us lots, and most of it was rejected, time and again, by the majority.
It wasn't because they asked for fanbase input. It's because they asked for fanbase input
without doing proper surveying. 5e's design has been controlled by a highly motivated unrepresentative sample from the very beginning, and the crap-awful survey design and push-polling did not help in the slightest.
Also: it isn't even a majority. You only need 40% of feedback to be negative for them to scrap concepts entirely, never to be revisited. That's why we've never gotten a Psion, despite a clear desire to produce one. The tyranny of "every option must always achieve at least 70% approval or it's gone" was the death of most great things 5e attempted.
1:Zealot - I don't feel like this has that much of a mechanical identity that is different than the Berserk barbarian. It was a great archetype when the berserker was broken but now that it is fixed I feel like it falls flat compared to other options.
Here's hoping it got reworked for 5.5e. If so--and if you can persuade a DM to let you use Dexterity with it instead of Strength--the Zealot actually manages to be
the one and only example I know of where you can kinda-sorta, mostly, if you squint, approximate a class from a previous edition purely with a subclass rather than a full class. (That being 4e's Avenger class. Big weapon, high AC, no/light armor, Dexterity for attacks, advantage...it's actually quite surprising how
good the Barbarian is for this purpose if, and only if, you're allowed to use Dex to attack while raging. It's not quite where I'd want it, it does still fall short, but for being an imperfect match, it's closer than I would have thought.)