I always adored my Jackson with the JT-6... in my opinion it handles much better than an original floyd rose, I also prefer the fine tuners on the back, like the ease of changing the strings and never had any issues with it. I cannot comment on the quality of the metal: Mine simply works perfect so far. I also prefer the pop-in arm assembly to the screwy ones, but I see, why most people prefer the the screw-on arms.
I had some Floyd Roses where the fine tuning screws were way too easy to move and so I often would change the tune unwillingly with my palm.
Also my JT-6 still looks pretty fine, while a lot of the Floyd Roses have become very rusty over the years.
To sum it up: I would like to see a revival of the JT-6, but produced to higher standards with better materials, as this seems to be one of the main issues.
For me, the JT-6 remains my favorite tremolo bridge.