Garuda Hard Mode was designed for people wearing their original AF, so it's no surprise that people will obliterate Garuda if they are wearing their Zeta with Upgraded Poetics/Dreadwyrm gear. But, that doesn't mean that SE should adjust Garuda to make it more interesting for everyone (even the End Game geared players).

Garuda Hard Mode can still be a challenge if people would put on their AF/Darklight gear and iLvl 70 Weapon and take her on that way. But, let's be honest... Would you do that? And what about the other people who would just want to kill her in 3 minutes and queue up again to farm the Nexus or Zeta lights? People would make it more challenging for themselves, but in the meantime they are prolonging the battles of someone else.

If you really want to promote a battle like Garuda as it was intended, try creating a PF party with 8 people, put on your AF and try it like that. (^_~ )

The only thing i can imagine SE would do is putting a level sync on the Trails so that their gear won't go higher then... Um... Let's say... iLvl 90 for the Hard Mode Garuda Trail. But i don't think SE would want to change older content from patches like 2.0 to make them more challenging when we're getting this close to the expansion. (^_^ )