also, is there any improvement between "disgaea 4+" and "disgaea 7"?

I have been searching for this in the shop at the cheapest level and at the lowest level Item world. Is it in the LoC? Or am I missing something?

game is steamdeck verified but after the intro video I'm getting an endless load screen (lasts 10+ mins then I gave up). Do i need a specific proton version or what should I do?

https://files.catbox.moe/o9qsle.jpg Is the frequency with which unsubdued innocents show up in the item world tied to either: A: The size of the innocent. B: How deep you are into your given path. All the way into the item leveling path = never shows. C: Some combination of both. Anybody happen to know the answer? On the 9X floors at the end of the item growth path I couldn't get a single Mystery Innocent to show up out of 8 of them....

So I placed the RQ upgrade on the campaign map, and I have now a Specialty shop at the base. However I cant select the buy option. What am I missing ?