Playing for Orphin on a 500 stars map - game_1603, stardate 1345. It's probably only an early mid game yet. I understand that it's experimental - so no complains, just observations.
There are no serious performance issues on my supposedly weak laptop yet. A bit annoying are some weird (about 10 seconds) long pauses then meeting pirates and harpies after clicking a (single "choice") dialog - feels like it's doing some (unnecessary) global search or update every time.
Names database needs an expansion - did you thing about importing some stars catalogue. Anyway, it's just a cosmetic one.
The planetary report needs rework. The population details is "critically" missing, as well as an ability to sort on a bunch of parameters. Looking for and transferring particular colonists is a pain now.
The science isn't scalable at all. I've already learned everything useful (and almost everything in the list). Probably should've built more factories and less labs, but that would change terms just a little bit. Had the same problem with 99 stars too (just in the early late game). The obvious solution is to scale science "prices" to a number of stars, but that would be very confusing. Some (expensive) "quality" (n% smaller, n% cheaper, n% more population, etc.) science is needed I think. Or maybe some sort of technological "spell of victory".
Pirates and harpies could be mach tougher further from "capital" planets. Now newly discovered groups could be defeated with one or two upgraded destroyers.