I've been playing the Demon's Souls remake, and it's genuinely one of the most frustrating games I've ever played.
On a technical level, it's superb. Graphics are (at least in terms of pure detail, the art direction is very bland) the best the series has ever looked, and it runs extremely well which is something that can't be said for the original, but that's just about the only good thing I can say about it. It's wracked with baffling decisions from top to bottom.
Demon's Souls is a game that needed a remake, because it had a number of glaring design issues that were fixed in later games that made it a bit of a chore to play. Bluepoint, despite remaking it from the ground up, have changed none of that.
Weapons still require you to grind the same level over and over to upgrade them. Later games switched to spreading out upgrade material throughout the entire game world, which means that instead of gradually improving your weapon throughout the game as you progress, you use it at base level until you get to the area it's upgrade items drop, and then you use it at whatever level you can stomach grinding to for the rest of the game. In theory you can go right from +0 to +10/+5, but in practice you'll be fucking sick of the grind long before then so will probably settle for a sub-optimal weapon to save your sanity. I, foolishly, decided to go Bladestone, because surely they'll have fixed that 0.004% drop rate, right? Haha, no, start grinding those skeletons, idiot.
World tendency is still a janky mess, and the best strategy remains chucking yourself to your death in the Nexus so you can rush to Pure White by just beating the bosses, and then chucking yourself off cliffs in the level itself to then go to Pure Black. They were balanced around the online system, which was free in the original, but now requires you to shell out for a sub, and they can absolutely fuck off with that bullshit.
So, what have they changed? Pretty much the only things that made Demon's Souls interesting in a post-Dark Souls world, the art style and enemy design. It doesn't even look like a knock-off Demon's Souls, it looks like a knock-off Bloodborne or Dark Souls. Worst of all, it sounds like one two. I genuinely couldn't believe it when the music started up during the Phalanx fight, all intense chanting and loud as fuck pounding music. The same Ornstein & Smough knockoff the series settled into repeating over and over ever since DS2. Phalanx is a slow paced fight about picking away at a thing hiding behind a shield wall, it just doesn't mesh with this sort of tune.
It just being a bad remake of a good game would be fair enough, but the fact that it's existence means there's little chance we'll ever see the remake Demon's Souls was actually crying out for stings.
Spending £550 to play the fucking thing hasn't helped my opinion of it, to be fair.