I think people are getting a bit better at using different jobs and slightly more creative strategies these days. There are still some people that go for the "I need (6-18) (BLM-SMN-Krakens) to win (CoP-BCNM-hNM-etc)", but between experienced players that's a minority now.
Before people used to take hours to kill Kirin with Blms and Smns, now everyone does it in under a minute with Monks and Wars.
Alliances are getting more creative with tanks too, someone already mentioned the NIN/BRDs and BRD/NINs, and even before that there was NIN/DRKs using stun, bind, and drk JAs to hold hate better, etc.
I think it's those types of more inventive variations and strategy choices that make this game more fun and interesting.
It's too bad that people haven't figured out a new better strategy to beat AV yet, unfortunately with all that's riding on the line in popping it it's unthinkable to really use that opportunity to do a lot of testing.
SE should add a time-repeatable BC ENM fight, even with no drops and just like XP reward with AV in it, so people could actually practice and try out new strategies for free on a dummy version of it without risking anything.
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