10 man Razivious is actually more proof why this is a good change, not proof that it's been done. Do you really think the terrible crystal idiocy was good design? If nax was a new instance and not a rehash, they wouldn't of even had the MC's on the fight, and they would of just put unbalancing strike on timer with a cooldown and made it another bland time your cooldown with adds fight.
Well, two points here. I don't feel that interactable objects are necessarily bad design at all - I mean, the extra action button is basically a 10 Raz crystal that appears in your UI instead of the world, an even more gimmicky solution. And as I posted in this thread earlier (I think- there are so many identical ones) I would prefer a return to the Wrath 10H model than stripping it out completely - and again, no points for snide references to 10H being Normal already.
The bottom line is that an Instructor Raz mechanic can clearly be ported to 10 and left in its original form on 25, so where is the constrained design space?