To be fair, something like this should be checked with recount's death log, would be quite a bit quicker than checking WoL. WoL does go into more detail on deaths though (such as checking for CD use, aura gains/losses, etc).
Recently we've had hunter woes, so we use WoL to compare hunters to eachother. More specifically, we compare our new hunters to our disc. priest's alt in the alt raids (the buffs in each group are either the same or very close, we try to account for differences
). Sadly, the alt always wins, even against better geared hunters, but it lets us go into depth on WHY these hunters are failing, such as checking CD use, abilities used, etc. One of them, for example, never seemed to use readiness (1 Rapid fire in a 3.5 minute fight as MM), and for some ungodly reason would just stop doing everything, even auto-shotting, occasionally. Recount doesn't pick those bits up as well.
Lastly, having recently started using it, WoL is very easy to set up and get running. A log doesn't take much work to create, and its uses are many.