Kojiyama covered most of it but to add a few things:
In most cases, the player should react to Clearcasting by spending it ASAP. Clearcasting being refreshed is bad, but not entirely avoidable because it procs off autoattacks which occur more often than the GCD does. I would suggest checking to see how many times Clearcasting refreshed itself while not in a GCD, as that means the player made a mistake in waiting when they shouldn't have.
Incarnation has a +100% multiplier so downgrading from an Incarnation rake is especially bad. If the player ever refreshes an Incarnation rake with a non Incarnation rake that is really bad. If it happens in the last 3 seconds of the Rake that's not as bad, but not ideal as you can reapply it after it's faded and do more damage.
Additionally, you should also look at the number of seconds of Incarnation rake they are getting out of an Incarnation. The player should be aiming to refresh Rake immediately when Incarnation begins, and then again when its about to end to maximize the number of buffed seconds to 40+. A very, very common mistake is to either not deliberately refresh near the end of Incarnation or to downclip the Rake post Incarnation, either of which results in about 30s or so of buffed rake time.
I would assess these from a different angle.
For Bloodtalons, statistics on what percentage of the time an ability was buffed by bloodtalons (and for DoTs, the percentage in ticks not in applications) are useful and interesting, but not what you want to be analyzing as its not entirely in the player's control to achieve some specific threshold on certain abilities. "Rip and FB always used with Bloodtalons" as Kojiyama said, is not possible. Instead I would look at what each Predatory Swiftness -> Bloodtalon buff was used on and audit those on an individual level.
Correct Predatory Swiftness consumption (anything else is wrong):
* Predatory swiftness has <=1.5 seconds remaining
* Savage Roar has <3 seconds remaining
* Druid has 4 or 5 combo points
Incorrect Bloodtalons consumption (anything else is fine):
* A charge wasn't used on Rake when Rake was either weaker or had <=4.5 seconds left (unless its an Incarnation downclip).
* A charge wasn't used on a finisher when the druid was at 5 combo points during the Bloodtalons. Using Savage Roar counts as "using it on a finisher" in this case even though SR doesn't actually consume.
Similarly, bleed uptime statistics are interesting but there are underlying factors that affect your uptime that aren't in your control. You can play 100% optimally and have only 90% rip uptime, or get lucky and have 97% uptime, etc. If someone has <90% rip uptime, while that most likely means they made a mistake they may have just gotten unlucky with timing and Primal Fury procs. I think its more useful to point out the mistakes made.
* Rake expiry when it wasn't an Incarnation Rake.
* Spending a set of 5 combo points on Roar when Rip is <=7.2s
* Spending a set of 5 combo points on Bite when Rip is <=5s (unless the target is below 25% health).
* Spending <5 combo points on Savage Roar when Savage Roar is >3s and Rip is <=7.2s
* Rip with less than 5 combo points.
Maybe some other criteria I'm missing but that should cover most of it.