Originally posted by N Katsyev
This really had little to do with the naval slider being weaker or other such things. Its the fact that a naval nation simply shouldn't suffer from distances seperated by sea as much a nation full concentrated on its land forces should. The more naval a nation is, their effectiveness concerning overseas posessions would simply be much higher. This land connection penalty is just a way to show that, and make the more naval nations, who usually include overseas possesions to be more united.
But it would improve naval so much that I'd suggest removing colonist from naval-land entirely (to stop punishing land)
If you still want them colonists they could be placed on centralization slider (-2 colonists from full decentral, +2 for full central). This would be to show that local colonization endeavours would easily be swallowed into other states efforts while a powerful centralized state would seek to enforce its will upon fledgling colonies ASAP.