Honestly, my only issue with BLU is that it was touted as a solo Job, yet many of the great abilities are gated behind group content, which makes no sense. Heck, with all the changes to the game to make much of the game's content soloable with Trusts, BLU would be the perfect Job (if they let you go to current level cap and even do end-game level dungeons/trials for the MSQ, just only in the story mode and not in the Duty Finder) for people that wanted to solo play, kinda like how the Knights of the Old Republic games had a lot of solo players wanting to play the MMO and upset they couldn't see the story solo.

Granted, I don't play solo, but I could see that having worked well had they actually gone all in on it.

BLU is fun, and making it like the other 19 would make it not a BLU.

"You get to use White Wind!" and it heals for 300 potency AOE as an oGCD with a 120 sec CD? That's not White Wind, that's Curing Waltz with a different animation.
"You get to use Mighty Guard!" and it's an oGCD that reduces damage taken by the party by 10% for 15 seconds on a 120 sec CD that later traits to 90s? That's not Mighty Guard, that's Troubadour/Tactician/Shield Samba.
"You can cast Angel Whisper!" and it's an 8 sec cast, 2.5 sec GCD that costs 2400 MP and Resurrects the target in a weakened state? That's not Angel Whisper, that's Raise/Resurrection/Ascend/Egeiro/Verraise.

Yeah, you could make a BLU that's just a normal Job with BLU names on spells but the spells are just normal spells.

That wouldn't be a BLU.

That'd be a RDM wearing a BLU skin.