Things I've 100% noticed from the new SMN (with a bit of speculation too).

[Maneesha]

about 4: i wouldn't be so sure, its possible, but saying you are sure is early. bahamut summon was already ready on the start of the vid, so we don't know if we have to go trough 2 or maybe just 1 trance to ready our bahamut.
about 1: he decidet to cast a skill, after it hit bahamut did move, like he usually does when he performs wyrmwave.we all know that while we cast bahamut isnt doing anything but looking good, until our spell hits and he performs wyrmwave then, so we might still be spamming oGCD's during bahamut/phoenix.

Edith: there is one instance where bahamut didnt cast on oGCD, this is when the summoner applied tri-disaster, maybe they changed the conditions how wyrmwave activates? maybe it activates now every 3 or 5 sec and is not tied to us using skills anymore?