Unrelated thing: I'd absolutely love if we could give Industry a more clear niche by making it more appealing to those going for a cultural victory (Rationalism is great for SV, Imperialism for domination victory), so I'd give the opener or one of the first two policies the ability to get golden age points for every unit purchase or investment, and I'd have each Industry policy increase the golden age length).
One idea I had a while ago was to have Industry speed up TRs by 25% or so. This would trigger more TR tourism and speed up the development of franchises. So all in all a good general ability that also has some tourism focus.