I was just thinking the same thing. It never made any sense to me, that the 2 exploration scanners took up internal compartments, when all the other scanners took up utility mounts.
I would agree BUT I'm working on certain assumptions that there are some things Frontier won't change.
Splitting up internals. Will never happen for practical reasons - too much possibility of abuse (turn one slot 6 into 6 slot 1s filled with SCBs or hull reinforcement for greater effect than a single 6 SCB/Hull package). Won't happen with "just" Class 2s because once you introduce it the pressure will be on to apply it to all internals.
Adding new internals. Will never happen for presumably future game reasons - I suspect the internals have been designed and organized based on actual modeling of the internals of each ship, based on the idea that in the future we'll be able to go to the back of the ship and see each of these things. Therefore they can't add things because there simply isn't room. That's also why while you can buy the planetary landing suite it doesn't also include the SRV hanger, because the PLS actually isn't a visible internal.
Changing the equipment they have. Though this is probably more of a consistency issue than anything else, I really don't believe they're going to change scanners from internal to external features. It would be NICE, but I don't think it's going to happen.
Therefore, I am pushing for the one thing I think stands an actual chance. A combined sensor suite doesn't disrupt how ED works at all. It's simply new kit, with its own benefits and tradeoffs (especially if it, say, used more energy and weighed more than taking the two units separately, as well as taking up a Class 3 instead of a Class 2 slot)