TL;DR
I think changing tile place radius should use the same controls as moving through blueprints in books (by default).Why?
Changing build radius for tiles is one of the most notoriously-unknown controls in the game. People on the subreddit often exclaim that they had no idea the build size could be changed.I think that intuitively, control+scroll wheel (as used in blueprint books) would be a better choice than +/-.
It is faster to change size as you don't need to take your hands off the normal controls, and simplifies controls without affecting usability.
