In games like street fighter, you can INSTANTLY rematch when the players are happy to reuse the same characters.

It really kills the energy and momentum of a 1v1 when after a couple rounds, you have to wait a couple minutes only to re-select the same characters again.

I would be happy to not get any steel/rewards for continuing to grind 1v1s with someone because I'm having fun and am more interested in the fight than the rewards.

The taking you to loading screens to rematch is a very jarring experience.

TLDR- I'm impatient and I think more people would Duel if it was rematch friendly.