I find the UI/UX experience regarding Harvester Pads and Supply Tanks somewhat onerous. I think the mechanical limits are fine (but I'd enjoy upgrade potential in future updates).

What I'm more frustrated by, is having to manually link advanced operators to supply tanks during builds/rebuilds. It's a repetitive operation and often suffers from camera/UI friction as you have to scroll around to find your supply tank or whatnot.

My initial suggestion is a retooling of the Harvester Pad and Supply Tower to be Area-of-Effect; out to X tiles. It'll hit any applicable operator within that range, still subject to flight speed. The player could/should still have the option of setting specific priorities/linking specific machines to specific providers.

This is less of an issue with Harvester Pads, due to them being fairly easy to set once.