Strucutral Integrity view in survival mode
In survival mode it can be very tricky to build as high as possible without your towers collapsing, which can be frustrating but makes the game very interesting. However, I think the structural integrity view (which is available in creative mode) should be somewhat implemented in the game for the die hard survival players. Preferably it would be implemented as a skill that you can learn and possibly improve. Additionally, it could be incorporated in the blueprint function where making a blueprint of your building reveals its structural integrity to you. This would allow the survival players to really push themselves to the limit when it comes to building high structures.