Like all maps, there will be maps some people enjoy and others don't. No map can appeal to all players.
A lot of issues are subjective. "Doesn't play well" for one person can be "a new fun type of pattern" for another person. There is no one absolute truth on the matter and the bottom line is that people who don't like the map shouldn't assume the same things they personally don't like are also things others dislike. Play the maps you like, stay away from others; osu has quite of a big map selection to appeal for everybody.
Either way, modders should try to see the map from the mapper's point of view when modding, and suggest things to improve the map (with the mapper's intentions in mind), not to change the map into something else.
A lot of issues are subjective. "Doesn't play well" for one person can be "a new fun type of pattern" for another person. There is no one absolute truth on the matter and the bottom line is that people who don't like the map shouldn't assume the same things they personally don't like are also things others dislike. Play the maps you like, stay away from others; osu has quite of a big map selection to appeal for everybody.
Either way, modders should try to see the map from the mapper's point of view when modding, and suggest things to improve the map (with the mapper's intentions in mind), not to change the map into something else.