Again, this is only my
opinion, but I found nQuestLog to be the best quest tracker--from visuals to how you could interact with it (clickable headers, colorization options) and SorhaQuestLog was the closest alternative.
I like carbs' tracker as well, jut not nearly as much as SorhaQuestLog (it fits in with my UI better than carbs, and acts the same way).
Only real difference (that I see) between carbonite and these two mentioned addons is that the latter can be used as a minimalistic "quest log" or watched list instead of only a "quest watch list", yet providing the ability to do both within the same frame [auto tracking (from new quest, zone change, quest update or watched quests), stop tracking quests that are done.
I tried looking into Carbonite.lua to see what might prevent SorhaQuestLog from having clickable zone headers, and if it was possible to comment it out. I quickly gave up though, it must be hard to keep such a complex addon up to date with the recent sweeping changes.
Please don't let any of my comments get you down, as Carbonite is defenetly one of my "must have" addons. Please keep up the outstanding job when possible