Worldoflogs and the like are usefull for yourself or for your raid if you have the time to analyse it.
Ingame links of meters are useless for the most. No real informations are linked, just e-peen.
Even for dps, for exemple someone who doesn't switch target, or sartha 3D where the dps is really important at some point in the encounter.
Healing, with different assignments, different class, you can't simply read a meter and see something usefull.
There is plenty of things to do to look good on meter, a lot of these are detrimental to a raid, it's the reason why some don't allow the use of meter, cause their guildies are not mature enough to play well instead of competing for the top of the meter.
If, in analysing the data, you find a player who is doing stuff incorrectly, witch assume you know is class AND that you can read and understand the meter, then you can explain to him what to do, that is basicaly the only usefull use of meters.