That new placement of a FGQ and then taking out Powderhorn in my opinion is a really really bad idea. The beauty of Powderhorn is it's one of the few steep areas of Solitude you can actually do laps on. You can't do laps on the backside of Honeycomb (well except for Navarro) while Powderhorn gives you the east face, the more nortern face as well as some nice cruisers down to Moonbeam then you cruise back to the base of Powderhorn and do it all over again. On a good powder day I've spent all day on that one lift (except for the occasional Honeycomb Return after dropping off the backside through the Powderhorn gates into Honeycomb.
I really think Powderhorn is the best lift at Solitude, it's one of the few lifts there that is actually long, and replacing it with basically a HSQ to a FGQ doesn't really replace it's versatility.
As you can see from the trail map if you want to do any of the double diamonds to the East of Powderhorn (East is left, into the map is south for reference) you need to use Powderhorn. If they were to replace Powderhorn with the previously mentioned lift system in order to do laps on that area you would have to ride two lifts instead of just one, which in comparison is just annoying. Now if they did add a FGQ from the top of Moonbeam to the top of Powderhorn and kept Powderhorn that might not be a bad idea because then the variety of black runs throughout that bowl would be easier to lap on although you could do the same from Powderhorn so it's not that big of a difference really. The only other advantage I see to that FGQ in that location is it would make it quicker to do laps on many of the gates into Honeycomb because you could ride that lift up, dump back into Honeycomb, ride the Honeycomb Return lift, ski Rhapsody down to the new lift and after riding it be ready to dump back into Honeycomb. That however seems like a pretty niche market and not enough I'm not sure to support a lift.
Case in point, I really don't think removing Powderhorn and not putting a full on replacement (ie same lift line) is a good idea whatsoever, but that's just me.