I've been wondering about this too.
They did say they would think about doing something with limpet controllers* but there hasn't been any word on it since then.
I guess if we are lucky we might see something here with the Q4 update.
My take on limpets is that they are your 'hands in space' and should be more widely available.
To this end limpets should become ammo and all ships should have a small limpet capacity and a built in short range, short duration limpet controller that can do all the things.
Limpet controllers would still exist but they would serve to increase range, duration or other attributes of limpets and/or to add ammo capacity.
Ammo capacity and limpet controller defaults would server to further differentiate base ships, for instance you can have a mining focussed ship with a larger base ammo capacity and a controller that is good at collection and prospecting but rubbish at everything else. You could have a combat ship that with a nod and a wink is good for hatch breaking but doesn't really do anything else. An explorer with some better repair capacity, maybe good for sample taking limpets. A multi-role ship that can do a bit of everything sort of okay but not great.
For players this means you are more likely to do things that pop up randomly, like helping someone out with refuelling or repair and gives you some choices about whether you want to use you limpet ammo capacity to do that versus other things you might want it for. At the moment I'm pretty much never going to luckily have the right kind of limpet controller on hand to do any of these things - I might have a collector limpets on if I've been mining but that's about it.
So opening up limpet controllers like this gives you the flexibility of adding controllers to improve capability and capacity (so they are still useful and you'd want to use them), improves the ability of FD to differentiate ships and add interesting NPC and player interactions around them and gives players more play options and choices. I really don't see too much of a downside really.
* Sorry, too lazy to find the source, you'll just have to believe me (or look through all the previous limpet controller threads).
