Hey.
I decided to be funny and combine the randomizer with Warptorio (https://mods.factorio.com/mod/warptorio3_2).
Using the normal randomization model, I think this works correctly.
(I'm not sure about the "Technology prereqs" setting; it doesn't seem to do anything without the unified preview also active, even testing on a completely vanilla save.)

The real problem: If I toggle "Unified preview" in the mod settings, the technology tree for Warptorio breaks. Lots of the mod's important researches that don't add new recipes, like platform size, get lost and can't be researched anymore.

I wanted to give you a heads-up about this while the new unified model is still in testing. 👍
(P.S. I'm on mod version 0.5.6 for Factorio 2.1.20.)

Thanks for the heads up! I'll need to add manual compatibility for things like this. Currently, unified preview integrates some randomizations that are not as mod-compatible, so I'm not too surprised there were interactions like that. Still, I can try to fix it since this issue is pretty straightforward. Tech tree rebuild redoes the tech tree so each recipe gets its own technology, which is necessary for reasons I can get into if you'd want. That also means the old recipes are hidden. However, a lot of warptorio's special techs don't register as "doing" something to the randomizer, so those get dropped. It needs to be told specifically to keep them. I'll do that hopefully before the next update.