There' s nothing wrong with adding your ideas to an existing IP (most of them, Fall Out included, are big and/or flexible enough to accomodate them), as long as you do it while respecting the original work and its author.
I disagree. But even if that were the case, you can't simply add a couple a few bits of nostalgia after completely ignoring, insulting and downright undermining the original work, and expect that to work... Just like you can't sprinkle a few chocolate drops on a turd pie and expect it to taste good.
I fully expect this series to be Fall Out on its most superficial level only. At its core, it's probably going to basically ignore (or worse: try to undo) any an all characters and lore that gets in the way of whatever crappy idea the producer has in mind...
It'll get the visuals well enough... And then disregard the main themes and atmosphere of the games. The stuff that actually kept people coming back to Fall Out.
And when it fails, the fans will be blamed, as usual.
"How dare these commoners not appreciate the work and ideas of the enlightened showrunners? The only possible explanation is that they are ignorant close-minded bigots!"
*sigh*
I hope I'm wrong... But I'm not optimistic (obviously).