Oh! Charging occurs outside of the initiative sequence? I hadn't realized that.
Yeah, for simplicity's sake - well as much as that applies for 1e initiative - I am not using that fighter multiple attack initiative complication. I get why that's there, but this is a one/two-shot for friends who want to try out 1e (and I want to experience running UK4 When a Star Falls for them), and so the more streamlined I can get it - while maintaining the core essence - it probably best.
My advice?
Make your own simplified initiative system.
I recommend something similar to the following-
1. Initiative every round. One roll for each side. After declarations.
2. Get rid of most of the bonuses, complications, etc.
3. Keep spellcasting times if you want to keep the idea that spellcasting in combat is hard.
That's it.