I hate having to spam a map to understand the song's SV changes, in all honesty. I can play the song fine if the rhythm isn't fucked around with. Why not normalize the map?
[/opinion]
I can understand actual SV changes. You know, when a song's ACTUAL BPM changes. But maps like
https://osu.ppy.sh/s/144959 should NOT be ranked. Especially due to SV changes on the last few hold notes on the MX variant. SV changes on the end notes just to fuck up HD or FL players? Serious? Disappointing, not necessary. If they had any purpose other than to fuck with the player, then I'd be fine. Only if the changes were even beneficial in the first place...
[/rant]
I can understand SV changes, just when well used. But it seems very often that people misuse the FUCK out of SV changes. So I don't vote.