You likely wouldn't notice the seam from a distance, but if you wanted to try to improve it you could fill it with Apoxy Sculpt it is a 2 part epoxy clay, mix it together and fill your sceam. You can put a bit of water on your finger and smooth it out. It can also be sanded. You would just need to do some light painting to make it match afterwards.

An even cheaper solution would be baking soda and super glue. Don't use the gel super gul, the thinner the better. fill your seam with baking power, drip super glue on it. It hardens almost instantly to a plastic. It is sand-able and paintable as well.

It might be worth having some sort of reevaluation plan, maybe every year or two for the defederated. Communities do change and people sometimes grow up.

This is also in the middle of a massive amount of growth.