Yes, GearScore is a terrible way to measure a player's skill. And yes, you can clear Karazhan in full greens. That said, some of us—including me—still find it useful for a quick gear overview. After some tinkering, I got a TBC backport working for Onyxia and figured I’d share it.
Yeah this addon is buns... Just like the others I have tried... At least the other one gives me my avg ilvl (way better metric anyway). It is funny equipping higher ilvl items now and seeing my gs go down :D
From my testing, as well as feedback from others who tried it, everything seems to be working correctly—T5 items have a higher score than T4. While the scaling is different (as Nerfukas mentioned, around 2.7—2.8 being T4 BiS), the numbers increase appropriately with SSC/TK gear, and the color progression also follows a meaningful pattern.
I released my attempt at fixing this issue just today. I have rewritten it to not only factor 2 calculations A and B, but actually all of the different phases.
What issue? Everything works perfectly fine for me and everyone I've shared it with (the version I've posted). Not sure what the other dude was talking about, maybe he didn't install correctly or confused the folders