There's a few maps out there that really abuse this to ludicrous levels, such a shame that once they get ranked you can't do anything about them. Specifically ones like Sister's Noise lv 42 and Don't Cut 7k extra, and even Intersect Thunderbolt 7k Exceed to some extent.i don't find anything issue in Don't cut, i think it's well enough if in the case you are talking about LN abuse.Thunderbolt.. is just the jacks for me, nothing else. But sister could be a problem (because simple song) but well since no rules that can make against this so this isn't really a problem
I think it would be a bit less of an issue if the star rating properly rated this pattern style (and so many others *cough*), but personally i wouldn't mind if it was used less since i think the penalty for missing LN releases is harsher in osu mania compared to something like o2jam. I could be wrong though, as i have not played that in years.