I don't have the patience to watch 1+ hours of this, so I read the first few pages of your script and I think I've seen all I need to see.
Your arguments fall incredibly flat to me. With most of your issues, my immediate response is simply: "Why is that a problem, though?". The only justification you seem to be giving for most of your issues is that BLU isn't up to par when you compare it to what other jobs can do. But why on earth would you compare it to normal jobs, when it's not at all trying to be like them? It's its own separate content trying to do something different and its own thing, just like Gold Saucer is, and just like what Island Sanctuaries will be. You're expecting Limited Jobs to be something they aren't, something they're not trying to be.
If you don't enjoy the gameplay, that's totally fine, but you're seemingly claiming it's inherently flawed and can never work in an MMO solely because it isn't similar to, or tied to, the main gameplay loop. You're not really arguing that BLU and Limited Jobs don't work, what you're actually arguing is that BLU and Limited Jobs aren't like normal jobs and you don't like that. If you treat it like a normal job, of course you'll be disappointed, because it's not a normal job. I also saw you mention replayability and rewards, but again, this is not the main gameplay loop. It doesn't need to be highly replayable or rewarding, it's totally fine for it to be a finite thing that you play for fun and then put away until new content comes out.
Personally, I like BLU and I hope they make more limited jobs. Why? Because I like collecting things and completing logs in video games, which is clearly what BLU is supposed to be about. It's a mini-game about spell collection and log-completion, and it has some one-time currency rewards as an added incentive as you complete those logs. It's also great for when you need to grind old FATEs for relics, as it's powerful, flexible and syncing doesn't affect its kit.
If you don't like BLU, that's totally fine. You don't have to like this content, you don't have to like all the content in this game. I'm sure you're not spending very much time with Mahjong or Lords of Vermillion either. Different strokes for different folks. As this is an MMORPG you're just going to have to be fine with the game having a wide variety of content that doesn't necessarily all appeal to you.