You're a great guy, and I have a lot of respect for you, but on most of these points I do find myself disagreeing
Why? If every boss is killed immediately every time it spawns, surely that's a sign the game is too easy. Everyone screams out for more challenging things but when something is made that's too challenging to be camped and killed by solo players he gets asked to make it easier. No idea how Andy's brain hasn't turned inside out with these back and forth requests.
I think he's done a great job reforming gold drops. There used to be way too much gold, now there's a little bit less gold circulating than there was but it's still within reason. The way it works now is much better, gold find is increased really nicely, it benefits people who spend time levelling rather than people who do bosses.
Yes, it's a mid level cave. It's pretty easy mid levels to level there solo or in small groups, and it's possible for a large group of mid levels or a small group of high levels to complete, but nobody bothers because it's not possible to just jump in and finish in 5 minutes which seems to be what most people want these days. For people who want to just do quick easy bosses there's already plenty, these caves are not that, they are for people who want to get something different out of the game.
The number of bosses is only inadequate because a handful of people choose to only do bosses all the time, so the majority have to find something else to do. There's a lot of other things to do if your focus is a little bit different.
I've been to KR and killed it and he was only agreeing with me
Long story short, the game has lots of different aspects, if you focus on one single aspect you will get bored quickly. You've chosen to focus on getting the best items, which involves bouncing from boss to boss. That's absolutely fine, but you're clearly bored and want more. There is a lot more out there to do but you've skipped it all. I've probably spent a lot more time in this game as you have, I don't have quite the same standard of kit, and there's a lot of people who have spent a lot longer than I have, yet we all still play. Every day I log in I've got interesting things to do and enjoy that sometimes doesn't involve any bosses at all. It's all about diversifying your gameplay, spread yourself out a little bit, rather than rushing for the endgame.