Lately I seem to be falling a bit behind on TPS/DPS scales and could use some help getting over my hump. I took a summer break from WoW and catching up with all the changes now. Any advice with Gear and especially Gem/Enchanting I might need to make would be helpful. I think my build is solid, but would easily make changes to it to reach the next level. I'm currently seem stuck in the 1300-1400 DPS and 3500-4500 tps arena.
your tps seems fine imo itll improve with better gear and hit and expertise.
as a warrior your dps is always going to be lower then other tanks.
Only situations i can think your having threat issues would be aoe pulls in which case use marks have the dps focus down skull first before aoeing the rest this will give you enough time to build threat on the others via thunderclap, cleave and sw. Or if need be ask them to give you a few seconds alone with the mobs
Lately I've spammed devas and SS whenever I can on boss encounter, while using HS whenever I got the rage (read: all the time), with a slow wep. Doing this gives me about 7k tps on standard fights like Kologarn, Razorscale or KT.
What you need is expertise softcap and hit cap. Spam HS whenever you can.