I really enjoying the game. This tech tree is super awesome, mainly b/c its so extensive. The only things i would critique.
1. The game seems very short compared to the tech with a rapid jump in difficulty once you get to the thorium levels.(super fun though still)
2. I have only found a very few amount of the campaign maps that allow you to fully utilize the thermal generator or even the Thorium generator b/c of resource scarcity.
3. Its impossible to use the thorium resources in early part of the campaign (As of where I'm at right now) which goes in to its very difficult to grind for phase materials b/c the levels that give you access to the materials only one gives you direct access out of the gate.(Nuclear Complex)
I really enjoy this game and look forward to any upcoming changes