Point number one is something I would like to see outside of just a rather big dialogue overhaul in general. The relationship changes the overall dynamic of the character, on top of needing to do more to build a relationship and be limited daily, etc. Such as only being able to talk to a character once per day, or gifting them one thing per day. (KeepHerDev, MOAR gifts, please! Flowers! Chocolates! Dolls that don't make my workers sad little antisocial workaholics!) The current iteration is such that KeepHerDev added a consent button. Honestly, I get it, some of the characters give a lot of mixed signals and it's rather cumbersome. Hopefully, a dialogue update will make it seem less R-word-y in the future. (Also, when asking "How do you feel about" about the PC, the characters don't seem to understand that "PC's name" and "me" are the same person, and tell PC to F Off and that "Me" is the messiah)
Point two, while annoying, is fine as is. If you select the PC instead of the servant, guess who gets pregnant? The PC is considered the receiver in all interactions they initiate unless doing a pink card in combat. I would like to see the other picked character in the interaction also have a stat block, much like in combat. It's difficult to tell if the other characters involved are truly enjoying themselves or about to die, etc when using tools.
I wouldn't say your third point is so much an annoyance as it is your base build in general. If you would like an invader to go a certain route, then make it happen at the start. Unfortunately, there is no way to remove rooms at the moment, so you need to have a straight line to an assigned "worker". (I keep my main "guard" assigned to an Infirmary two or three rooms in, following a barbed wire trap, with my throne room immediately following the Infirmary, and my dungeon branches off from there).
When an invader kills my main guard and myself, I'd rather them just loot me and get it over with instead of watching them slaughter all my level 1-10 slaves and harem waifus. This is the first update I haven't needed to use a single cheat so I can get all my money back with no problem. Currently been able to have a perfectly self-sustaining dungeon with only about 21 rooms where I gain more resources than I can use between invasions.
Point four needs no comment, spot on. A new crafting interface UI would be superb, and I would like it to be initiated from the corresponding room with an assigned worker possibly increasing production as well. I.E Regular crafting from a workstation, and alchemy from an alchemy room, bandages at the infirmary or workstation.
As for point number five, the game tries to start your origin off as a new keeper when building your character and will give you a tutorial from there. It mentions it when you skim over it, but I do agree there could be an in-game menu of tips and general knowledge. Like how does your OC level up? Room count? When your other workers gain xp do you get some also? /shrug (Seems to be the latter)