Well, Gym #6 in Serenity needs a blocker like Seanport as well. Right now, I'm wandering around there with no one home. To complicate matters, I don't think saving inside is a good idea; I feel that somewhere a switch will be reactivated and I will become a permanent resident. Add that to your list. :)
Meanwhile, I'll tinker with some movement permissions; it appears you can walk behind the things that generate electricity and end up standing one square away from the volts on the left or right. That makes no sense, so I'm making those tiles unwalkable.
Meanwhile, hacked into the Daycare area on Route 417. I know you don't actually see beyond that last row of tiles at the top without walkthrough wall cheats or changes to movement abilities, but it didn't feel right having weird forestry there. I've added two rows so I could start the proper row of trees in that area and continued the rest of the tileage from below (trees or cliffs) on either side. Retook a couple of shots to complete that top area on my map so it looks pretty. :D Of course, this led to the map being offset from Serenity City by 2 tiles; I thus had to expand it and Route 413 as well. So far so good; I just have to fix Drakebreath City, and thanks to my temporary path hackin, I can do that quickly (and that's actually the EASY one, I can reassign two rows of Route 416 to the city so as to not extend the path any more than the current version).
The funny thing is, except for a single tree tile from a tree that no longer existed (and the opposite, a tree without its edge, somewhere below), 413 would have looked great in the offset position, perhaps with a small path adjustment.
Once I'm done, if you want to verify that nothing is messed up, I can send you a savestate that can be picked up from where I am now (Power Plant is my next stop); I will leave the savestate on Route 417 and you can walk around the hackin path along the top through the daycare area, or just travel the Route as normal (BTW, I have not battled the Trainers in the savestate in question), back to Route 413. Provided all Trainers operate as they should and no signs are unreadable (I already saved past the script at the start of the city, but I am 100% certain they are placed correctly; everything else is testable), then I can proceed playing from there. Right now I've taken a break to map through to Drakebreath City, and I might try to get 416 before moving on as well so I can just play and write my walkthrough by that point (hey, might push into 415 a little as well); my only mapping complication is the script stairway, which I can change one movement tile to get around to get that last corner. LMAO Obviously I'll have to map Victory Road as well, but at least I'll have a bit of a break in the overworld. Especially with 416. And I already did a rough map of the Victory Road surfing zone for someone earlier today, putting water and rocks in manually, so it's even mostly done. :)