Not really. Keeping things as simple as it could be is better principle.
Photoshop can use whatever it wants. It is not the problem of Aseprite, only a reason for confusion of less technical users. If tomorrow Photoshop will add new existing extension for its own needs it does not mean everyone around should bow to it. I didn’t even know that Photoshop use .ase extension. My old version of Photoshop never wanted it.