I've been thinking this from the start. The genres really just don't seem compatible.
Souls-likes are at their core about the fights themselves. Sure you can make builds, but unless you're going out of your way to cheese things, you're probably still fighting the enemies and dealing with the mechanics like anyone else. Outside of boss fights, you fight at most a handful of enemies, all of whom have been very deliberately placed in a level to create interesting encounters that are the right balance of difficulty. Also, your healing is very limited so that the game can punish you for mistakes without outright killing you because you will run out of resources at some point.
Diablo-likes are about the builds. The enemies are merely fodder for testing out whatever nonsense you've made. The norm is to optimize the shit out of your builds. The whole point is to eventually trivialize things. Enemies are randomly generated and placed. You don't get well crafted encounters outside of bosses so when you're presented with a mob of random enemies, your solution is to just kill them before they kill you. Also, a component of build crafting is often sustain and if you can build infinite sustain into your character, then the only things which can kill you will just be one shots.
There's no obvious way to resolve these contradictions. You kind of just need to pick a lane. If they really want a game that's fundamentally different from PoE 1... they need to make THAT game. But that's really far away from the game they've actually made and I don't think any reasonable amount of early access tweaking can get them there from here.