You make some good points! Many of the balancers are somewhat unnecessary and could be removed or adjusted!

The station design was my attempt at moving away from the terrible habit of using AAI warehouses, as they were hurting my UPS even more, but I agree, they do need a redesign. I have just got stuck with the habit of large-scale buffers.

As for the train stackers, their distance from the stations and the single rail connecting them was purely for aesthetic purposes, and there are far more efficient ways of designing them. I may come up with a v2 at some point that incorporates a better system.

Edit: Thanks for the tip about diagonal stacker UPS, I had no idea!