Think for beginners, FYD is harder than we give credit for
I think you’re right that it isn’t easy, but it is a lot less hard than any of the ‘red’ routes at more mountainous trail centres. I’ve never ridden a ‘blue’ route at other places, but I imagine if you’re looking for singletrack but not as hard as a ‘red’ route, then it probably fits the bill.
I’ve been with a few groups of mountain unicyclists round it as pretty much their first proper off road ride, and they did find it hard work. The good thing about it though is that all the difficult bits (eg.the various little drops) are obvious and easily walked, and on the off chance someone does get too tired, it is pretty easy to get back to the start on the fire roads, you’re never very far from the start because of the shape of the loop.