I think it's just that. See the Stickler rock* garden at Swinley for a perfect example.
More to the point, that review bears no resemblance to Dalby at all!
It's long - yup
It's featureless for long sections - (I think that's what your quotes getting at)
It gains height painfully, then meanders through not quite flat sections that sap speed (and in some palces the will to even pedal), then plumets you back down the valley. Not sure what the reviewer does like, but I'd take 5 minute decents over Dalby's plumets any day!
It's not that well maintained either, I'm not complaining, I prefer a bit of rough, but I wasn't a fan of the trails whether they were smooth or worn in. I just didn't get it, compared to trails like Swinley (which is flatter) or GT (which has a bigger set of hills) which both flowed better.
*note, singular, rock