Another issue is half my players don't seem to take the time to really try to understand the rules and I am often left explaining options and rules on a regular basis. So it isn't clear to them the benefits gained from initiative slots.
I absolutely hate GMing for or playing with people who refuse to at least glance at the rules for a game. Just says to me "I don't care enough to invest half an hour into figuring out how to play, so now we constantly waste a ton of time while you continually have to educate us."
This is precisely why I just spend the last hour printing 12-page reference material for my players. They'll never wonder how Advantages, Triumphs, Threats, and Despairs work in combat or with their skills ever again! Woo hoo!