I haven’t used X a ton yet, just messed around at home… but here’s what I don’t like about the timeline that noone else seems to be bothered by… i don’t mind the horizontal magnetism, which of course can be nullified, its the vertical magnetism, or as i call it the “gravity”, where all clips have this unstoppable gravitational attraction to the centerline… I use the tracks in my FCP7 sequences, especially during very complicated long-form, as reassuring method visual categorization, i.e. all my GFX clips on track 7, all my stock photos on track 6, etc. etc… same with audio, i push all my music down to tracks 10/11/12/13, etc… so can i very very quickly just zoom out to the big picture and SEE what my music is doing, SEE where clusters of photos or graphics are… i find this much quicker and more visually elegant than having “roles” show me where things are in a jumbled X timeline… it helps my brain feel organized simply by seeing the whole thing as an orderly graphic object, rather than the forced jumbled pile of blocks of an X timeline.
In short, I like to put things where I want to put them, vertically, and have them stay there.
Otherwise i really like X.