Yeah, a lot of people dislike alternating because it gets pretty confusing. I guess I'm lucky enough to not be confused by it initially.

Anyway, I should clarify that I said that to explain why reimu can't stream 200 BPM consistently when he can single tap jumps in higher BPMs. It's just easier to use one finger to go faster when you use your wrist or arm to do the movement.
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I have to say that I do have issues overtapping sometimes. Might be something I have to work on. Maybe I just need to play more, which I actually don't see myself doing much since I'm mania player :^). Maybe I need to switch to single tapping since that tends to be more consistent, and osu!standard is a consistency game mode.