I think it depends on how you tackle the trails there and what kind of rider you are.
The black route is indeed very easy at a comfortable pace, but if I let it go a bit too much, I’m much more at risk of binning it big time there, than anywhere else at a Welsh trail centre. (Not including the DH stuff at Cwmcarn obviously!)
If you’re not used to man-made jumps and how to handle them (which I’m not and I’m sure many predominantly xc riders aren’t)) you could come a serious cropper without too much effort if you push yourself beyond your limits.
I’m much more in my element flying across rocks n’ stuff or in tight singletrack, cuz that’s what I’m used to – anything approaching a bmx track or dirt jumps is a different kettle of fish and I proceed with much more caution.
In that sense it poses a technical challenge.
That said, I loved Llandegla as a bit of a change and it does encourage you to develop your jumping skills. I don’t think there’s anything wrong with blasting full pelt down wider, bermed trails as opposed to tight switchbacks every now and then either. 😀