Probably nothing will break, since we already bumped up limit of max tiles and polys.
Main reason behind it was ensuring that users don’t end up with thousands of tiles holding just a single cell. 16x agent radius (~ 2 or 3 cells) means at least 32x32 cells in tile, which gives region detection code something to work on. Ideally you’d want to have >100x100 cells for tile, both for performance (less tiles = faster) and usability (bigger tile = bigger polys = easier pathfinding) reasons.