On Bloodborne's subhect, I'm actually going through it atm, it's pretty good but yeah I don't think I like it as much as Souls. Few things annoy me, like how seemingly mashing attacks can actually beat bosses because of the regen and shit. They made the combat faster paced and stuff and less reliant on blocks, but I haven't used a block build since demon souls anyway, I just find them boring and I always go like fast weapons(rapiers, daggers, scimitars etc) or big 2H, and I don't block shit other than arrows and what not. I feel like Bloodborne dodge has a ton more iframes though, so it makes it kinda easy, and then you wail on the boss and even if you get clipped by a small hit as the boss turns around, np you can heal that. Makes it look kinda easy, especially with fast flasks and a ton of them.
Another issue I have with the game is the lack of weapons. The weapons they have are kinda nice with the 2modes and shit, but the issue I have is they use the same system of weapons being accessible as you progress, however you don't have options for each weapon type early on. In souls, you can get a shitty(or the BiS) dagger right from the start, and a Zweihander, and an axe, and a hammer and a sword and so on, all from the start/within 20mins of the start. They're not the best version of the weapon type(most of the time), but they're accessible right away so you can pick your style and then have meaningful upgrades to that style as you progresss through the game when better versions drop.
In Bloodborne however, since there's only one weapon per style, it's possible to go through the game for an extended period of time without being able to use that weapon. I wanted fast skill based weapons, and your options are really limited for this unless you kill a NPC early on(which I did). And once you have the weapon, there's basically no upgrade in sight, that's what you're using for the rest of the game. You can modify the weapons obviously, but that's not different than souls upgrade systems other than giving you more freedom to customize them. And the weapons having 2 modes isn't really much different than having 2 different weapons in Souls. Sure you can also have 2 weapons in Bloodborne, but a lot of time it feels kinda useless to do so because your main weapon probably covers both aspects you'd want anyway(fast hits and slow hits, with different reach so you can "aoe" or single target efficiently, most weapons do these 2).
And then they killed magic builds entirely. There's a little bit of magic, but very little really, and it's not class defining at all as far as I could tell. In Souls, you ended up with 3 fully unique magic builds(4 maybe in souls 2, I don't remember if curses and shit could make a full build). Arcane mage, Fire mage and Holy mage(simplifying). And you could mix and match these with weapon types to make stuff like paladins, right from the start. Bloodborne basically removes that aspect entirely, so that feels even more limiting. Ranged weapon builds also seem pretty much not viable until the later parts of the game as far as I could tell. Not that ranged builds were particularily viable in souls either, but I think they were still a bit better.
So yeah I hope they stay closer to Souls game for DS3, they can definitely implement some shit from Bloodborne, but not too much would be fine. Stuff like the weapon upgrades with "gems" you can put in and remove is pretty great for example, since Souls had a way more rigid upgrade path. I guess potentially adding firearms would be pretty ok too, as long as they don't replace bows and crossbows. And weapons that can change forms would be nice too for some of the high end weapons.