TL;DR: I like the game, it's worth the price and then some, it's not perfect but I can see it getting close to perfection through early access. Remember DRG started out super bare-bones.
I started playing DRG back in the early days, a couple of weeks after it released into early access on Steam. It was extremely charming, if slightly bare-bones, and I managed to sink about 150 hours into the game across early access. Every time an update rolled out, the game got better and better, more complex and with all sorts of new mechanics.
I have every faith that the same thing will happen with Rogue Core. There are things that could be improved - cave layouts can get repetitive, there are obviously bugs (although no Glyphids that I've seen), and once you've played several runs you generally know what to expect from the mission.
But overall, the core of the game, if you'll excuse the pun, is very solid, especially after the first patch completely overhauled the way that upgrades work. It rewards teamwork and cooperation and it rewards learning the classes and various upgrade systems so that you can figure out useful builds. And even if you have to pivot your build mid-run because you took [i]one[/i] poison upgrade and now every round of upgrades is all poison-based, generally speaking, it's still [i]fun[/i] to work around it.
All of the classes have a unique feeling to them that makes it feel worthwhile to at least learn the basics, and if you want to be a better teammate, it's useful to familiarize yourself with their strengths and weaknesses. There is genuinely an impressive amount of depth to the bio-booster decks being mixed and matched across classes after promotion that lets you broaden your horizons or focus on something more specific.
My current problems with the game lie mostly in the overall lack of variety, which is to be expected from an early access game where they're busy making sure the core mechanics work before branching out to new things. There is the aforementioned issue of taking an elemental upgrade and now having half your future upgrades based around that element. The cosmetic tree is somewhat lacking in interesting choices. And I do get tired of seeing the one cave generation that's got a tube of rock right through the middle of a big hollow space, with one easy-to-miss room tucked to the right of the cave entrance.
But these are all things that will be ironed out over time as GSG adds more content in general. As of right now, I think the game is in a solid state, completely playable and enjoyable solo or co-op, for more than enough time to justify the price.
