The wind dots in a Trmr don't compensate for estimating wind speed. "Reading wind" and applying a wind correction are two different steps. 1. Determine direction and effective speed. 2. Convert effective speed into a hold. The Trmr just simplifies #2. If you suck at figuring out the effective wind speed the Trmr won't fix that.
I've used all the Trmrs, the H59, 58, 30, and 37. I pride myself on being able to use any reticle and fear the day that any of them become a crutch. The 59 and T3 are pretty much the same reticle. What is truly simplified with the T3 is engaging a target array like a Troop Line. If you hold half mil for the near target, you more than likely should not be holding half mil for the next farthest target. You should be increasing your hold commensurately with the distance. Besides simply guessing, this implies you should be running the wind formula thru your head as you think to the next target. Instead of consuming brain power to do this, with a T3 you just hold the same wind dot all the way out.