As much as I like the Commander's styling over the Grand's... if what you suggested (drop the GC name and call it Commander) they'd be talking about dropping the GC, not the Commander... So no, the big boxy Commander is going to go away unfortunately. The next gen GC may look more like the Commander (I really haven't heard any rumors about styling yet), but it'll keep the GC name.

IMHO the only possible good that could come of this is moving the GC to a BOF (body on frame) design like the Durango, though what's more likely is they'll shift the Durango to the uniframe design like the GC.

All around I think it's a bad idea though. If anything I think they need to drop the GC, drop the Aspen, keep the Commander, and put the Dakota, Durango, and Commander on a common BOF platform. Upsize the Commander to at least the size of the Durango so it's a more suitable Jeep-branded tow vehicle, stick the new baby V6 Cummins under the hood, and watch the sales roll in.

The problem with sharing the Durango and GC is DCX, er, Chryco, has been trying to upsize the Durango to finally play with the Tahoe and Expedition, but the GC has always been a smallish mid-size luxury SUV, smaller than even the old Durango. I think it'll be hard for them to find a common platform/chassis to share btwn the two very different vehicles unless they downsize the Durango (smaller, uniframe) or upsize the GC (bigger, BOF). Problem with a BOF GC is it's competing against uniframe luxo-utes, most of which are already IRS too...