TL;DR
Make the "worker robot cargo size" research infinite to allow larger bases that rely on logistics robots.What ?
The worker robot cargo size research could be made infinite, probably with exponential cost, like the worker robot speed research.Why ?
The infinite robot speed research is great, but the exponentially increasing cost means that a large base which relies on logistics bots for all transport has poor performance.My current base, which produces 140k iron per minute and 80k copper per minute with bot-based smelting, needs over 50,000 bots: which drags performance down to 20ups.
If the worker robot cargo size research were made infinite then fewer bots would be needed, performance would increase, and I might even be able to catch a glimpse of my base underneath the cloud of bots!