I'm working on a number of rules ideas of my own. These are all hex-based and fastplay. I've given some indications below of their proposed 'level'. I'll be posting more about them in the blog section as they are developed, and, of course, tested.
1 model is 1 ship.
ACW/19th Century Battalion Hex
Each base is a battalion occupying a single hex. More.
Interwar Company Hex
Each unit is a multibase company occupying a single hex. I probably won't pursue this since discovering Red Actions.
Interwar Section Hex
Each unit is a section, individually mounted, which may spread over several hexes.
WW2 Platoon Hex
Each base is a platoon. Up to 3 platoons may occupy a single hex. More.