A little bit more to add, if possible.
Aspect of the Eagle is survival's major DPS cooldown, and should be tracked in cast efficiency. Lacerate uptime should probably be lowered to around 80-90% uptime, as it's better to cast Mongoose Bite with 4+ stacks of Mongoose Fury than it is to spend a GCD re-applying Lacerate to the target. Same thing with "Time not Focus-Capped" under Resource Management. Mongoose Bite doesn't cost any focus, and during Aspect of the Eagle, when you're spending most of your GCD's on Mongoose Bite, you're more than likely going to focus cap.
If possible, it'd be nice to get a number for the amount of Mongoose Bites used at 6 stacks of Mongoose Fury compared to possible number, and/or a number of Mongoose Bite casts available compared to how many used. A cast efficiency bar for Flanking Strike could be useful, but it's not necessarily needed, as you don't need to use it on cooldown, but it does have a greater chance of generating a charge of Mongoose Bite, which is your main source of DPS.
I really do like this site, it's very useful, and as I main survival hunter, it's nice to be able to check what I may be missing or messing up on. My only problem at the moment is that the major DPS cooldown and DPS ability don't have any sort of tracker.
Thanks for all your work!