Fury Warrior tierset value is already off the charts - so don’t believe we need more from there. We likely need more from base damage increases if we should prove to be struggling.
Last time I looked up numbers, fury tierset was a ~30% damage bump up. On avg, it is around 15% for specs per tier; for reference our first tier set was ~3%. Based on this, I say we don’t have to worry about our value for (2)+(4) set.
A problem with putting TT on a 1min CD, would desync from spear and other CDs. It would not line well up with OF itself, nor would it do anything but have OF even more shackled as a baseline ability.
I am sorry, but if you want TT current design to get more value, then the best way to do so is buffing OF as a baseline ability. A solid 51% on OF would do wonders, then - in a dream world you would even delink OF and TT, then let OF nodes fly free and high. Then you could turn TT to a standalone avatar modifier that could work with all builds.
Something like, when you pop avatar, your abilities do nature damage as lightning during the duration or something else animation/SFX flashy and fun. A neat damage bump in PvE, makes it a high threat CD in PvP vs Plate, but does not overly scale against cloth wearers. Also, its would fit the rule of cool (the most important rule). Having us look badass during it.
More OFs or Avatar does not equal more fun. Harder hitting OFs equals more fun I would even argue that SFX/Animations are more important to the feel of the spec, than numbers and equal to rotation. It is the main reason people hate on slam, have you used it as a Nelf? Oboii is it sad. On-press it is basically just a Raging Blow functionally, but the sound and animation is dungdung…
If you want more OF (or avatar uptime), then the tierset is already giving that a plenty. More would just be overkill uptime levels.
Perhaps there are some key problems that I am not seeing or am aware of, yet - from my stance, this would just create more than it solves.