I would be happy with small scale abstracted tokens for troops, machinery etc. (and rules) that could be used in land actions. Something simple and less expensive that could be combined with and influenced by naval actions at sea. if it took off they could expand and/or make more complex miniatures. If it doesn't work, the investment lost would be smaller.
I think landing troops, vying for control of the sea side battle space or bombarding the shore with weapons of different sorts, throw in some air support too, would add an interesting dynamic to the naval battles. It would also make a great campaign. I would be all in for this.