With the LX finally where it should be, they can focus more on the GX make it a bigger threat to the GL and others, the GX has already surpassed original sales expectations as it sits, imagine a redesign (which it's almost due for) where it was lighter, faster, roomier, more advanced, and more efficient to really destroy the Merc's sales, X5, and others. And the GX is already a smashing deal at its price.
I actually hate the GX. It really has no place in the line up. It's a Prado disguised as a Lexus. The same goes for the ES. They're cheaper to make due to economies of scale, but not the in the same league as the rest of the Lexus catalog.
I think they should just get rid of both cars and focus on Lexus only vehicles. Lexus should be handing down or sharing some market leading technology with Toyota not share a whole vehicle and re-badge it as a Lexus.
I like how the LX is now moving further away from the Land Cruiser, they almost look like 2 different cars and I hope that the next one is a completely different vehicle; I think that's where they're headed. This would probably explain the large number of pre-orders of the LX. It no longer looks like a re-badged Land Cruiser.