Have to disagree with you on this. When you switch from gi to no gi, you will lose the ability to use:
- "pulling" to set up pushing,
- monster grips to disable your opponent's movement.
- stiff arms to hold your opponent away.
- ...
IMO, not to be able to pull can be the major concern in no gi. Of course you can pull your opponent's:
- neck,
- wrist,
- elbow,
- shoulder,
- ...
Since it's different pulling from the lapel pulling, you may need to train those new pulling from ground zero if you have not done that before.
The Judo foot sweep is a good example. It may require to use pushing to set up pulling.