What a pain!
This system they've used is simple for regular play, but for expansion modding, it makes many things difficult if not impossible! Finding empty slots alone can be a real pain, especially if you want prerequisites.
Only allowing 2 prerequisites is meager as well.
I'd like to start a thread on ideas of how to make room in the research tree for more subjects.
Can we shrink the icons to make room for more rows/columns?
Can we expand the window a bit? It looks like there's more room down below on the TEC tree...
Can we add some sort of paging?
I would love to see IC thoughts on the tree and if they have plans to change it in the future.
I would call the current trees barely moddable unless you shuffle things all over the place...