Should Thunder be left out of rotation for BLM?

[Hasrat]

Hmm, I'm sure it used to say it... but anyway it's a thing, try it on a striking dummy

I swear, there's a lot about the whole UI/AF mechanic that doesn't get clearly covered very well. I think part of it is now that they're not listed as status buffs, we don't have a means to just mouse-over and see what the buffs do. You have to go into the job gauge description now just to learn some of what the buffs do. The absolute worst offender, tho, is B3/F3. Might be wrong, but, I think that nowhere in the game will tell the new player "Hey! At full ice/fire stacks, you can use these level 3 spells with reduced cast time to quickly swap to full stacks of the opposite element!" Sure, it feels nice educating the budding BLM in Stone Vigil just hitting 40. But some clarity on the full effects of the mechanics would be appreciated.

Instant cast Flare in AF3 is also worth it (especially if you can cover any Transpose lag with a Thundercloud), but otherwise, basically, yes.

Edit: Actually, I'll correct myself: You can do better damage with a Fire III > Fire II * (1 to 3) > Flare > Transpose rotation from level 50 to level 68. Fire II becomes (technically) worth it at this point due to the extra potency of Flare, which offsets the losses due to AF / UI switching (even with a few seconds of Transpose lag). One caveat though is that you always want to be ending the rotation with Flare and taking full advantage of its damage (i.e. be sure the mobs will live long enough) otherwise you would have been better off just spamming Freeze.

Kinda thought this was a bit of a contested subject? Fire 2, as I understand it, is just taking up time you could be using on Flare, even at 50. Unless I haven't kept up with new info, I was under the impression that 50s AoE amounts to Fire 3, Flare, Transpose, repeat (with appropriate Thunders, naturally). Why wait for more MP regeneration than needed, and instead just roll right back over to Flare soon as you can (MP ticks allowing).
But I'm hardly a meta-gamer, and I know that, if nothing else, this does feel somehow less satisfying. Transpose? And hard-casting F3? It just feels wrong.