A few people already mentioned, getting to the hit cap depends on stat weights. Getting exactly to the cap isn't always the best option for increasing your DPS. That seems counter intuitive, so here's an exaggerated example to illustrate why.
First, we can all agree that there is a limited number of options to get you exactly toe the hit cap, correct? Now, let's say Haste is your best secondary stat and Mastery is your worst. It's possible that the only combination of reforges that can get you exactly to the hit cap is by reforging all of your Haste into Hit. But Haste is your best secondary stat, so that isn't ideal. Now, let's say Mr. Robot can get you to within 0.1% of the hit cap, but he reforges all of your Mastery into Hit to get you there. This would result in more DPS.
I have some more examples in a
blog post, for those interested.
Falling: As for the Run-Speed enchant on the boots, Mr. Robot scanned your entire character. He saw that you had the talent, "Death's Advance" which gives you run speed. As far as I know, your talent and the boot enchant don't stack. But if someone has a source saying otherwise, let me know. Anyway, Mr. Robot is trying to be a very smart, friendly robot, and helping you by suggesting a non-speed enchant in this case
Mr. Robot really is smart, and accounts for
everything. Racial bonuses, talents, socket bonuses, set bonuses, profession bonuses, etc. If there is something he missed and didn't think of, let us know. We will add it in