Complete speculation: what if we no longer have H-20 but a heavy multi role combatant? Something large and strategic ranged, but capable of decent speed. The roles not limited to strike, but also commanding drones, launch AAM, carry self defense missiles, etc. Perhaps it will use its incredible electricity generation like an AWAC too? There will be a roomy interior to faciliate command of dozens of drones, many crews inside. The bombing bay itself may not be so large. Emphasize just fitting a few oversized strategic munitions, volume deemphsiazed. Strike volume will be decentralized to smaller drone swarms.
If J-36 is air cruiser then H-20 is a air mothership?