How good are the players in your group? One of the interesting debates among the guys from No Laying Up on their recent Michigan trip was what they thought of the Loop, and what was interesting was that the good players didn't enjoy themselves, while the higher handicappers loved it. And that's not because it's easy, but because the way those two types of golfers consume their rounds. The good players didn't like the super firm conditions (and I'd agree when I played it a couple years ago, it was really, really firm, maybe too firm), and pushed up greens on some holes that made scoring near impossible. I had a similar criticism when I played it, that you could not get anywhere near a front pin, because if you tried to bounce one up, you'd hit a hill and die, and if you carried it to the green, you were bouncing to the back if not over the green.
But for the higher handicappers, they saw a place where they were almost certainly not going to lose any golf balls. Higher handicappers may struggle with chips and pitches off of tight lies, but you can putt from everywhere at the Loop, so they weren't chunking chips all day. They could be more creative with shots that were easier to hit, while lower handicappers tend to want to hit certain shots a certain way, and get frustrated when it's hard to do so.
That said, I still think the Loop is really good and it would be a shame to miss it if you're there. We stayed one night so we could play it both ways, and the accommodations were nice. Not super luxurious, but everything we needed. I haven't played the Weiskopf.