Now "Omit first bar line" is only available in taiko and it works well for players to read in the parts of frequently bpm changes.
Osu!mania mappers are more often to map piano music which changes bpm more constantly, so in that kind of parts "Omit first bar line" is really useful for players to read properly.
Osu!mania mappers are more often to map piano music which changes bpm more constantly, so in that kind of parts "Omit first bar line" is really useful for players to read properly.