My first world try (help and critique very welcome)

[DragonLord]

Well, it's better but you still have some problems:
plates can't really "expand" themselves like the 10th one.

Take exemple with North America plate for exemple: it's created in the Atlantic, move to left and it hurt the Pacific plate where a mountain is created.

To resume, plates can only move in one direction (but it can be South-South-West for exemple).

I hop you will understand what I mean.

[ukie]

Well, it's better but you still have some problems:
plates can't really "expand" themselves like the 10th one.

Take exemple with North America plate for exemple: it's created in the Atlantic, move to left and it hurt the Pacific plate where a mountain is created.

To resume, plates can only move in one direction (but it can be South-South-West for exemple).

I hop you will understand what I mean.

Yes I see. Same problem with 5 and 9. So I think if I move 5 W-SW only, 10 S-SW,E, 9 W-SW only it would fix it. I was trying to avoid them chasing each other (what Diamond commented on).