Hello,
After having done some researches, I saw that staff could potentially enable using mounts in areas where it wasn't possible yet.
Sources to support my suggestion :
https://pokemonrevolution.net/forum/topic/79190-mount-riding-pokemon-tower-underground/#comment-463155 (Best Litwick spawn + Repel)
https://pokemonrevolution.net/forum/topic/158258-using-mounts-in-new-mauville/#comment-876626 (Best Magnemite spawn)
https://pokemonrevolution.net/forum/topic/195299-mounts/#comment-1112332 (Running Shoes are planned for buildings, but what about locations outside or inside of cities having spawns where you still can't ride your mount ?)
So to follow what I've emboldened, I would like to propose few locations having spawns where you can't use your mount yet with the explanation :
Lost Tower :
Located south of Solaceon Town in Sinnoh on Route 209, It's a good alternative spawn for Murkrow, especially at D(Day).
You usually go to Route 18 at M(Morning) / N(Night) to be Repelling it or even regularly hunting it, also this spawn is quite similar to Lost Tower.
But the thing is it doesn't spawn at D in Route 18, hence my suggestion to enable mounts in Lost Tower compensating that and for our convenience.
Sprout Tower :
Located north of Violet City in Johto, this place has one of the most interesting spawn for Spinda and Rattata.
Good timing ! There is the Summer Event going on with a newly introduced Rattata form.
Bell Tower :
Located north-east of Ecruteak City in Johto, this place has one of the most interesting spawn for Spinarak.
Burned Tower :
Located north-west of Ecruteak City in Johto, this spawn has nothing special but just there hoping to be able to use a mount like the other ones.
They're the remaining locations I could think of.
I think it would benefit the community as a QOL change, whether for the reporter when it's asking for Murkrow on the 6/7th day or more convenience in general when hunting.
Regards
Fafouney