These are some great ideas. Granted, it'll definitely be more work for the devs so there's a chance they won't do it, but I do agree that these minigames should have some additional rewards besides earning the Love/Lewd points. Like maybe if we do enough of the dishes or windows Anna would have sex with the MC.
Also, I would like to point out that the Windows minigame should have a neutral option to decline without earning the Love/Lewd points, as it is right now the first three choices earn Love whereas the last one earns Lewd, and this kind of sucks if you accidentally click on Living Room and this minigame pops up lol.