I think Rim Dinger might have been tamed a bit since opening, whether naturally or by the builders, it used to have some really awkward “hard edge in a bad place” stuff which I don’t remember on more recent visits. Deep Navigation is pretty lumpy-rock but not so much sharp edges. There’s a couple of places that you can definitely clumsily drop onto an ugly rock, but for sure they’ve gradually removed a lot of those (the one that broke my rim on one of the reds is gone, I guess I wasn’t the only person to stupidly hit that one)
TBH I think Cushcore’s about as good an idea as it is basically everywhere, don’t think about it as a BPW thing, it might be good for you all the time and if it’s not then it’s probably not good for you there.