I think I submitted this idea before but one of the annoyances that makes me turn off the timeline is that without doing that it's impossible to edit some sketch without getting pushed back in time.
So often I find myself wanting to create a sketch, do something in a perpindicular plane, and then use things from that to define more in the previous one. If I try doing that with timelines on, I either have to accept that F360 pushes me back in time to before the new sketch was created (which defeats the purpose), or I have to create a new sketch in the «present» that overlays the first sketch, then project geometry in, then use the second sketch.
Either way is convoluted and annoying, and if I have to turn off design history then I lose all of the timeline dependent functionality