Broken Steel was bad. I'm sorry, but the only cool thing about it was helping or destroying the Brotherhood in reality. You (or a companion or the Lyons chick) ended up dead (pile of goo) after you messed with the purifier. It was just not needed, and it felt really weird. How could you (or anyone else) come back to life after so much radiation? It's improbable.
Which is where the complaint comes from that Bethesda has bad writers.
Retroactive Continuity, or retcon. When the developer says something and then later goes back and says "remember that thing I said? lol nvm, I was joking."
Bethesda does it all the time, and it gets really annoying when you can't rely on them to stay true to their own lore?
"What, the Lone Wanderer a sacrificial hero? No no, he survived!"
"What, the Enclave dead? No no, they had the firepower to destroy the Brotherhood of Steel 7 times over all this time and didn't use it because uhhh.....DRAGONS yeah that's it dragons got in their way or something cool like that, so now you have to finish the fight."
"What, Redguard hate magic? Did I say Redguard? I meant Nords. Cuz yknow, Barbarians and stuff."