it would be great if we could have numbers - for PBM or just puzzles - it would be useful
I don't know if the numbers would affect gameplay overall- I only say this based off the maps in the downloadable demo being blank. Based on the those rules what little I've gathered from others on how the expanded rules work, I don't know if it will need to come into play. I think I would also be cool, but I'll wait to hear about the final product when it's out.
I can envision reasons for them in the future, even though there isn't a use for them now. All kinds of things.
Advanced munitions for torpedoes. Land-based games. Predesigned scenerios with terrain such as clouds and mountaintops and minefields, or fortresses on the ground.
I sometimes use the ones on the BT map to randomise unit set-up, especially when the game has a force coming onto an existing battlefield.
Recording locations of units and orientation for particularly long games where we have to quit and come back, but can't leave stuff out, makes numbered maps downright essential.
So, yeah. I really hope they number them.