Also, UE was buggy. And I hate those transformers. Transformers should MULTIPLY and DIVIDE voltage, not ADD and SUBTRACT it.
So I got UE working pretty well now. The problem is that there is only one specific build of BasicComponents that works (and the Voltz crew is using a totally borked modpack in general, so don't take their experience as gold standard), but once you find it everything seems to work. I can give you my build list and configs if you want.
As for your complaint about transformers, I am not sure what you mean. The steps are 120v, 240v and 480v, right? And those basically control the amount of energy deliverable to a machine per tick. I think the only way amperage comes into play internally is for power loss over wires.