Thanks! It's a cool idea and giving a user the ability to specify the words, but let the algo choose their locations might be an easy extension to try out. The behavior you describe can then be met. I've added it to my personal backlog, cheers!

BTW, grid neatness isn't a limitation itself, the size and complexity (overlaps, large words) are. Also I already do symmetry checks, so helping users generate symmetric grids shouldn't be too hard.