Where should we BE ABLE to mount side mirrors ?

One problem is the A-pillar and door frame are more likely to get in the way if you move it to the A pillar without either sweeping them back or moving them out.
Also the more you move the mirrors forward the more you limit the view immediately behind the vehicle, and the further outwards you need to move the mirrors to regain that view. And the further forward you push them you get and offset of increased FOV but will less detail/magnification of the object in that field. So those two tradeoffs might affect some state laws, but might simply reduce efficacy versus current positioning.

Door travel is also a big issue, and if you swept them back to maintain view then they are further in the way for normal use. Limiting the travel of the door, limits access to a vehicle that is often higher than most, and with the grab handles being where they are on the a-pillar you have competing use models.

To me, as mentioned in the other thread, make the mounting bracket modular so that it can be easily taken from the usual spot to the door hinge mounting point, and then make the wire loom/harness a simpler disconnect that either mounts higher up to accomodate retaining power features when moved, or has an easy and cheap harness extender for when the doors are off (could even make that part of the door hinge mounting bracket).

As to the super lightweight concept likely wouldn't include power mirrors if they aren't coming with power locks or windows.
However, as for it saving costs for entry level, I doubt that would help that much, most of the savings come for a single design that's interchangeable across platforms so you don't need different stamping setups and parts bins for something fairly universal like that.

Also, considering the low cost of cameras another option is providing small cameras in the A paillar that feed images to the centre console or Instrument cluster, but that likely wouldn't meet legal requirements, unless there were dedicated monitors for those views. A nice 5-7" screen at the inside corner of the A-pillars would sufficient, but definitely far more costly and complicated than just some mirrors and brackets, so likely this would end up a Sahara and Rubicon option more than the low cost Sport option, which is likely a better way to do non-standard than go for the low end. However in general the video rear view / side mirror solution is somewhat counter to the 'Wrangler ethos' per say.

Personally the vent mirrors along with two long rectangular 'blind spot' mirrors lengthwise down the A-pillar works well enough for me.

 

Pic of a current hinge relocation bracket.

 

Probably don't need two separate threads on this, so will post in other thread instead.