I've noticed that the Winter Patch has scrambled the tree again (this time with only immersive running). Civics appears to be unaffected. Some tweaks to the tech file (costs and line position) look to have fixed this. I used the original era screenshots posted as a guide to replicate UG's intent but had to fake some 'third column' costs in. I've attached the updated Techs.xml that I'm using as a stopgap till UG has opportunity to update. Place this in the Immersive Eras (V. 1.0) folder in your mode directory (or use in a merged mod if you're going that route), making a backup of the original UG tech file. Given the holiday season there is little reason to feel entitled to an immediate official update but thought I'd offer a band-aid for things. Hope I didn't step on any toes with this and look forward to a 'UG approved & tested' version, minus my butcher, learn-through-dissection approach.
Tangentially I would be interested to see players thoughts on some of the tree modifications made by the Winter Patch. My main reason for using this mod was less the 'bottle-neck' effect and more an elimination of the beeline ability. From play-testing how are people liking the un-modded Firaxis revisions to tech? Does Immersive still function as a better solution to technology progression or have they (Firaxis) come closer to achieving balance in the Winter Patch?
As always, many thanks UG for your mod and quick correction of a game in need of balance.