i am level 72 and i still can't decide which faction to choose... i would have never chosen the institute, but their 3 repeatable quests give 472 xp each (+ 44 from a persuasion check). the brotherhood and minuteman quests on the other hand, give around 100 xp...

so, the question is, will i keep getting 100 xp from the BOS quests if i choose them, or will the xp be adjusted?

does anyone have a clue?

I don't know. But speaking of XP "exploits" if you find a terminal connected to a safe, and pick the lock on the safe first, you can use the terminal to re-lock the safe. Then pick it again. And you keep getting XP for the lockpicking. Granted you only get like 10 xp at a time, but if you wanted to grind ....

Well, You can carry up to five BOS radiant quests at once (Cleanse, Tech, Scribe, Farm, Kid) plus the "turn in stuff" ones. I've only ever gotten 2 from Minute men at once.

Plus the larger source of BOS quests is good for caps, which you can use to buy building materials, to build to earn more XP.