Technically this exists in the form of canisters. I think we need shuttles and stuff that can aid in mining and transport and other activities that do the same stuff as limpets. A mining shuttle would be cool that can act as a prospector and mine. Say it can land on asteroids or something and mine and be a prospector limpet but be reusable. A transport one could be nice. You could have an option for dumping cargo when you have said shuttle. You tell how many to transfor, instead of abandon or dump, and it makes trips to the other ship until done. It could require both ships to have a shuttle bay or just use the cargo hatch somehow. A big shuttle could possibly carry 10 cargo and up to 10 people.
I think my signature has a link to an old thread about older ships from elite and one is the trasnporter. It could carry 10 t of cargo and 100 passengers. If this was a shuttle you could use it as a way to transport goods and poeple. Possibly add remove passenger mission starting and have it go down to the planet and bring all of them to your ship. They coudl be packed in like economy flight to get to your ship with better crew cabins(depending on class.) I wonder if you could use the shuttle as an extension of the ship allowing 10 cargo and 100 crew from each shuttle. I had one idea of these allowing stuff to be picked up for passenger mission on ELW/atmospheric worlds when passengers ask for goods. Since most of the tourist beacons are at ELW worlds you could send them down to get goods remotely while getting teh beacon. It could come back to the beacon after a while with the goods. And if they are nice the could act as extras storage to hold the items. 2 shuttles could be 20 free cargo storage.
Shuttles would be an alternative to SLF potentially. They could use the same bays or use a new type of bay. That could be a new use for crew. The third crew member could be shuttles. You can have a player, 1 slf NPC, and 1 shuttle NPC. This could allow some shuttles to have lower combat stats like the worm, and also pick up cargo from battles. While others are mining/combat focus or transport or other focuses. I think the transporter was said to be convertable to a medical ship. This means it could help with search and rescue and other things and extend those mission types. Shuttles could be used to enhance all parts of gameplay. One difference though is that shuttles could carry the actual crew member and he dies on it's destruction as opposed to SLF.