Both points are definitely valid, and should be considered before making the switch. I find that I usually have two in the rumble seat, so the communication to those inside is only a minor problem - but it can be a problem. The loss of trunk space is real, and should be considered carefully.
Have you found the required orange 6 volt LED light bulb to fit the socket?? I want to make the same change, but haven't found the bulb to do it. There is a 12 volt from the Aussy supplier, but no 6 volt.
I used A Shell commercial epoxy, and colored it black with Xerox machine block powder. I cured several applications when the crack was deep, 'til the crack was fully flush of epoxy. You will have to look hard to see the cracks after sanding the surface smooth.