The gameplay is still really tight (in most Ys games). Changing/removing music from it wouldn't make it just another generic JRPG. Most (action) JRPGs aren't anywhere near as good combat-wise.yes, you can also make a game worse by removing it's music.
as much as i love ys, it would probably just be another generic anime jrpg if it weren't for falcoms fantastic musicians.