Whatever would the story, in any version he is an asshole in one way at least. And he didn't change in the slightest even after achieving CHIM, which mean that he's an asshole anyway.
I don't say he was the worst emperor (most likely there were worse ones), but he's definitely not the person to follow, much less worship.
Conversely, if the LDB refuses to help the Blades he she is throwing away some of the best dragon slaying buffs in the game along with the support of those who would make the job considerably easier. All the onus is put on Delphine but the reality is that the LD should be equally accountable.
Well, for one, Paarthurnax proved himself an ally and a valuable source of information. I've probably mentioned this before - Blades inclusion in the main questline is unnecessary. The only thing they do to advance towards the goal of defeating Alduin is to explain the Alduin's Wall after which you again, go to Greybeards and Paarthurnax for information about the Dragonrend.
Compare
Blades - send Dragonborn to fight a regular dragon for no other reason but to prove his powers, send him to infiltrate Thalmor headquarters
Paarthurnax - provides information about Alduin and the time wound, actually helps you fight Alduin
Both can provide the same shout to summon Odahviing.
Overall, dealing with Blades only leads to trouble whereas dealing with Paarthurnax actually advances you towards the goal of defeating Alduin.
They can wait for summer)))
Anyway, even if Delphine and Esbern manage to survive there for some time, they can't do anything from there, only sit there and catch a stray deer sometimes so they won't starve. It's no better than Delphine's inn. This way they are not Blades anymore, just a pair of old people. They definitely cn't fight either the Thalmor or dragons alone.
And as for tnhat killing dragons is the DB's job... it's your opinion. Maybe the DB thinks otherwise? Maybe s/he thinks that now that Alduin is dead s/he can go smoke skooma in Elsweyr?)))
The Alduin's Wall thing is a critical moment, the first time you really find out what is actually going on. The Greybeards get all mad at you for finding out info and discovering the prophecy because up until that moment they refuse to tell you anything. I'd argue the Blades actually do more to help TLD than the Greybeards do until you meet old Paarthy. That's when things get complicated.
They can wait for summer)))
And as for tnhat killing dragons is the DB's job... it's your opinion. Maybe the DB thinks otherwise? Maybe s/he thinks that now that Alduin is dead s/he can go smoke skooma in Elsweyr?)))
Opinion? Nay, fact. TLD can turn away from his/her destiny, true, but that is like a Jesus refusing to Jeez.
TLD can have his own plans. Maybe he wants to make his own army of dragons like Overhate said? Or maybe after killing Alduin he leaves the rest of dragons to Paarthurnax to deal with? Or even maybe he's like my DB, supports the Dominion? (in this case I really don't envy Delphine).
Greybeards teach you to use the Voice. Gameplay aside (where you are a master after pressing the button the first time) these things require time, even for the Dragonborn.
Regardless, Delphine orders the Dragonborn to kill a source of information on Alduin, someone who knows his weaknesses and tactics, simply because of vengeance. A good leader would've swallowed his personal vendetta in the face of a greater threat. Observe