As a (possible) switcher from Cakewalk SONAR, when I first tried Studio One, most confusing manner was set the song length when make a new song and end marker is set there.
I didn't use any sequencer with this kind of manner.
When I'm using SONAR, the end of the song is always just after the last event.
This is like end marker automatically moves to end of the last event unless it's manually moved.
Isn't it more comfortable than set end marker position at first?
Same is the event length.
In SONAR, length of piano roll editor isn't limited by length of clip (event).
In other word, you can write 100 bars of MIDI phrase continuously without any attention to event length.
When I tried Studio One, piano roll editor ends where part ends felt very annoying.
These are what switchers like me would feel uncomfortable, and I think not difficult request (SONAR already does these).