I think things are going to be worse in LH just judging by the screenshots.
Starting with this one:
Reduced 71%Original 800 x 565
At the very best, the above screenshot makes me think we are going to have to do UI modifications to add new paths and to implement new skill trees. At the worst, we may not be able to add new content or we may only be able to replace the existing content and it look correct on the screen.
It does not have to be that way. Currently in FE you can change the tech tree and the new version is automatically rendered. I added an extra can-be-researched-multiple-times tech for additional prestige and it showed properly in the tech tree.