There's one big problem that everyone here has not taken into account: stat sync is totally broken. Queue for Sastasha with your lvl 70 character and check it yourself: your main weapon gives you 100 or so main stat, while the drops from there give you 2 or 3

Anyway, for a lvl 70 to have full kit in Sastasha, weapons and armor would have to give you negative stats. I mean, a lvl 15 tank would not be able to hold aggro if the dps has all their strongest combos available + an oGCD after every GCD

I support the idea of making the run less boring, but just making skills available and reducing damage would cause more trouble than solution. Unless power is reduced to the ground, then people will come to the forums to complain they are doing their complex lvl 70 rotation and are dealing no damage