I played this game awhile ago back when there was nothing like crystals or heat or materials or alchemy. It was closed for some time after that and I recently got an email for an invite to come back in.
I initially was like "whoa this game got much cooler" after looking at all the stuff they added. However after playing the game for a bit now it seems like, even though they added new stuff, the game isn't as FUN as it was before. For every "oh cool" moment I've had I've also had a "oh man... why did they do that" moment.
I think it's because they basically hit the game with a nerf stick. You can't use 3 weapons unless you buy an upgrade slot. Bombs can't be used unless you charge them. Equipment never drops in dungeons (at least I've never had one drop before). There seem to be no merchants in any of the levels (except for the non-combat break rooms). All the silver key doors have been replaced with energy doors.
It just seems like they put a greater emphasis on energy in general. I get that that's how they make their money, but people need to actually like the game before they're willing to spend money on it.
Though rather uncommon, you can find merchants in dungeons as well as equipment drops.
But yeah, a lot of things are broken and unfinished (as one should expect). There is already a (or two) discussion about bombs and some other stuff you've mentioned in the suggestion section. You might want to have a look.