I am both hands up for this.

More DPS checks, soft/hard enrages, as long as they are woven nicely into the fight.

Deathgaze Hollow from Dun Scaith has it done perfect. He slowly "contaminates" the arena, until there is no more safe squares and his next "explode all black tiles" wipes out everyone. Yes, you can delay raise through it, but it is akin trashing in agony before the next explosion.

All players can clearly see the arena getting less safe, the fight stakes rising with each square "blackened", game pushes you to perform better with adds that fills your LB gauge, the desire to pump your DPS efficiently is met with satisfaction of defeating boss before the "enrage".
(well, unfortunately, with power creep and retarded Ilvl sync, it dies insanely quickly without doing anything, but that's the story for another time)

Enrage doesn't need to be strict or anything. Accounting said Item Level bloat that eventually turns all Normal fights into players punching a fancy target dummy, people won't even see one for years. But the simple thought of the fight actually having a "bad ending" at the back of player's mind would be nice.

And more stuff for DPS checks in the fight, PLEASE. Break stuff to prevent raid-wiping ultimate attack, breaking party members from jails, killing adds before they snowball - I will gladly take all of that. Attacking one single target dummy for entire expansions getting a little bit boring, not going to lie.