SE, don't overthink Summoner 7.0. Just give people what they want. Just do it.

[remiff]

uhmm I admit I missed your point, I may have missed something with my reasoning.

on phoenix I think the your first option is the smartest choice to make. the oGCD one would be a utopia, but realistically I expect more the first option. Knowing me I will hardly ever use it t.t but it sure makes more sense than it does now.

What they could do is cast 1.5s/2.5s gcd on bahamut and add the automatic version like the pheonix everlasting flight spell for bahamut: Megaflare + ahk morn and deathflare to make it the ideal risk taking and burst phase,
since they want to remove the summoner resurrection for 7.0, they could just limit its use to increase phoenix support and interest for example:
Phoenix is summoned and use everlasting flight + every spell are instant cast but overall less potency than bahamut + Renkindle and 1 stack of instant rez ( basic rez deleted),
phoenix would therefore be ideal in situations that require mobility and support but at the cost of a DPS decrease.