There is a different level of impact. Resampling in-game takes a slightly higher toll than on the main menu (where the scroller exists), and much higher than on preview / postview screens (which only need to be resampled once at the start, and then again during the fadeout - the latter of which was recoded so that the duration is the same and it just skips frames if the CPU isn't keeping up). High-quality minimap, on the other hand, has a HUGE impact, more than either of the others (not to mention that if in-game smoothing is also enabled, it compounds with this to some extent). The in-game smooth resampling has the added issue of that, as ccexplore mentions (albeit for different reasons), it can render the physics a bit unclear; so the most common preference (assuming one's PC can handle it) would in fact likely be "high quality minimap on, in-game smooth resampling off, don't care either way about menu although on does look a little bit nicer" - which would no longer be available with your suggestion.
Using these options does not allow non-integer zoom in game (unless you've added this more recently), and lack of them does not prevent it in the menus. So your suggested name is also completely misleading.