If you're talking about the duels where you have to wait for about 10 seconds before it starts.. then I think they should stay the way they are! I'm pretty sure it's there for people that vager duel so they can make sure they actually want to do it.
10 seconds is indeed not nothing, but making it less isnt that good of a idea in my opinion. making it 5 could be too fast and 8 isnt a round number. 10 is just great, u got time to check the duel of wagers etc. u got time to make urself ready.