>>51651442Maybe getting a little autistic here but:
Connect route 2 and 16, extend 2 west to be able to see but not access parts of the badge check.
Expand vermillion bay to its geographic limits, add a beach and a boardwalk area, make a small hidden access point in celadon.
Create a large forest northwest of fuchsia, accessible via route 11, 13, 14, 15 and fuchsia. The fuchsia part of it is designed as a guided nature trail, think something like pinwheel forest where there's a road but you can go off an explore, except the road would end and the forest would continue.
Add above ground sections for Mt. Moon, rock tunnel and the unnamed mountainous area between route 7 and 12
Expand the meadows on route 7 and 11, maybe these can be locations for some sort of outdoor pokémon contests or amity Square thing.
Just generally make all the towns and cities a little bigger with more buildings and such.
Route 24 and 25 water is accessible, hidden connection (maybe dive or waterfall) to route 9
Expand and connect routes 19, 20 and 21 into one big water map and a few more islands including a diglett tunnel connection
That's about all I have, that's already a lot of changes and I feel like too much more would feel forced
