This game really isnt that good desu

I check back every 5 or 6 months for the missing subclasses and multiplayer and I get the impression they ran out of money with how slow they are making progress.

It's just another example of a genre peaking too soon. Happened to FPS (Doom), happened to RTS (AoE2). That said, there are still good games after those, if you're only going to accept something better than the best then you're never going to be happy.

Some of the worst optimization I've seen and I don't even know if I can blame Unity for this since games like RoR2 run better despite being even more of a clusterfuck.

I don't think they're making any slower progress than any other company in the business. Game development is just unreasonably slow across the board.

I check to see if they add multiplayer every few months or so, but yeah the game is meh but i am excited to see what they can do with warlocks or the new falcon class i guess.

They have always been slow. They don't release anything until they feel it is done right.

It doesnt have to be better, but they miss out on such obvious aspects.
Take gear for example, the quintessential core gameplay part of an arpg. In d2 you had several "tiers" of items: white items with no special properties, blue items with a couple affixes, rares with several affixes and finally uniques/sets. Pretty much every arpg follows this rule but they all miss the purpose of those items. In d2 more or less all of those categories had purpose: regular items could be bases for runewords, magic items werent necessarily worse than rares because even though they had fewer affixes, the values they could roll were higher, so for example you could get +3 all skills on a rare when you couldnt on a blue etc. And though uniques were very good you would still use some blues and rares. In all modern arpgs the game throws hundreds and thousands of items at you and most of them are literally worthless by definition. Regular items - worthless after first 5 minutes, blues - strictly worse than rares, worthless after 10 minutes; maybe you'll use a rare(unless you cant be fucked sorting through the mountain of garbage that drops from every enemy, which is understantable). I know PoE has a crafting system but it has its own problems.

>you could get +3 all skills on a rare when you couldnt on a blue
The other way arount of course

Agreed. One of the main pillars of Diablolikes is the loot hunt. Finding loot should always be exciting, rarely disappointing. Every single mob in modern ARPGs gives endless loot explosions full of useless garbage and it is always disappointing.

multiplayer soon bros

I can't explain why, but this game felt kind of bland to me when I played it. It seems competently made in general, but I just wasn't feeling it.