I am a test server player so this comes with the usual warning about it might not/might make it in a different form live but ...
ATM they have nerfed tribute haste to 5 ranks of 5% haste per rank making it 25 % haste max.To add to that they havent updated anything else about tribute for now as of march 21 00:40 am.
So if your currently running only tribute haste might wanna consider looking into worn haste options in case it does make it to live.