Thanks to the collective efforts of Nintendo and Steam, we had to wait an extra year and a half for a real version of this game, but I just got mine a few days ago and am rather enjoying it.
It's fairly different from the previous Compile Heart Vita DRPGs on the Vita. More complex and mechanically involved. Just from exploring the first dungeon, there's more gimmicks and travel options, more resources to manage, and overall the maps so far seem more complicated than the likes of Mary Skelter and Moero Chronicle/Crystal where they were all pretty basic. You can crush walls to find shortcuts and hidden treasure, dig through holes, float over gaps, etc. Combat/party comp-wise, in addition to your typical classes (Digiskins), you've now got SMT-style demon fusing (Gadgetta), weapons having their own attack and support skills attached depending on both the weapon and its rarity value, elements that are not only factored in when attacking enemy weaknesses but also with the users' own elemental compatibilities, armor having skills too, etc. Combat tries to be different from Mary Skelter and Moero as well; you now have an Action point system (EP) where you can take as many actions as EP allows, while magic (Digimagic) is its own separate category independent from AP with fixed use limits per dungeon crawl. In many ways, this feels like the "final form" of Compile Heart dungeon crawlers on the Vita. A very pleasant and welcome surprise. Even its version of the trademark Compile Heart touching minigame (old pre-Snoypocalypse Compile Heart, at least) feels a bit more animated than, say, Mary Skelter's Purge minigame, there's no limits on how many times you can do it or how long you can take, and it provides useful buffs depending on what you do. In the censored Switch version, the minigame is just skipped entirely and the buffs are random, making it much less useful.
Performance-wise, it feels very lightweight and much more optimized than typical Compile Heart PC ports, and I'm not sure how much of that is actual optimization skill (did Eastasiasoft really handle this in-house?) or just because it's a Vita game, but on my ROG Ally, it consistently runs at or close to 60fps (which it's capped at) with no noticeable dips even on the low power (Silent) setting. Definitely an excellent choice for your portable PC like a Steam Deck if you have one.
Natsume and Hotaru are good girls. Don't mention roaches around your Prime Minister. Ever.