I'm not fussed about the minimap, I play with it off anyway. I might turn off the compass too if given the option, I like checking the PDA for directions.
The ammo though is a travesty to me. Maybe I'm overly sensitive but for me it's such an immersion break, and these games thrive off of immersion. That's the whole dang point! Interchangable ammo is such a "video gamey" thing that every time I loot a container and see "assault rifle ammo" I'm going to be pulled out of the zone mentally.
I have a deep love for Greedfall. I think it's sadly pretty underrated. It's very janky, and time and again it's non-AAA nature rears its head, but it has such heart behind it. The good parts are worth powering through its flaws in my opinion, and it's not like they were asking for €60 anyway.
Like you say, the lore and world building is really quite interesting and I loved what they did with the language. Managing to create and enforce consistent accents for all the natives goes such a long way towards maintaining immersion.
I'm very curious how the sequel will turn out. Teer Fradee was the best part of the game for me, so knowing that it's a prequel taking place on the mainland makes me a little hesitant.