As the title says, this is a future idea and not to be implemented anytime soon.  I thought it would be a cool idea to have a few different carrier task groups, for EW, MW, and LW.
Early War:  1 Cruiser and 2 destroyers per carrier task group, a bit smaller but as it's early war a bit easier to defend bases.
Mid War:  Exactly what we have right now, except no groups would spawn 2 cruisers and destroyers.
Late War:  This is where my idea kinda changes the groups.  We could have Medium and Heavy task groups.  Heavy task group would consist of 2 Cruisers, 4 Allen M. Sumner Destroyers,  Heavy task groups could spawn maybe 1/10 groups spawned for a specific port.  Medium task groups would consist of basically what we have now.
Finally, Since we currently don't have the Allen M. Sumner in-game (If it's ever added.) It would be a great opportunity to update graphical looks of our current task forces.  I know that they've recently been update within the past few years.  But this update is meant for the future. 
Feel free to post your opinions,
Warthog