For a more hard core game play, and maybe promoting hex shaped blueprints, it would be neat to have the option to lock the hex divider tiles to not be changeable and to prevent building on them. Then almost no current blueprints would work and new blueprints would have to be made for the Hex setup. It would however require the max gap between the diagonal to be 4 or less for Nauvis and 4-9 on other planets to allow belts, pipes, and power. (Unless there is a reasonable way to allow only belts, pipes, and power on the gap tiles.) Would be especially interesting on Aquilo since then each hex would need it's own heating.

That's a neat idea. I'll give it some thought. Thanks!

That would be cool for an option but to be honest I personally would not play with those limits, even if I try to make my blueprints work on hexagons, sometimes for aesthetics or function I have to "invade" the gaps.

Also I think if that becomes an option allowing to build trains and stations is a good idea, focusing the gaps as "transport" areas rather than outright restrict (tho I am having issues setting up trains along the small default sized gaps)