if you're spending 50% of your budget on something that 80% of your audience will never see due to how you've programmed things, I would question if that's a great idea.
Presuming its done well?
Yes, it is ... bcs then those players will get story as fitting to their choices and therefore their character as possible.
And that feels good.
Also, they may talk about it with their friends and find out how much their experience differ ... and maybe one day they desire another playtrough ... or not ofc. xD
But maybe they will ... and we, who replay every game several times (like i completed VtM:Bloodlines at least 30 times allready and i still love it) have one big problem: Its never as sweet as first time.
Secrets are revealed, plot twists are known, etc. etc.
Replay is never as good as first play, everybody knows that.
Unless ... replay differs so much, so its basicaly first play within same eviroment.
That is obviously impossible to achieve perfectly ... after all, no matter how you get there, BBEG will still be the same.
But the more differences, the better ...
So yes, it is worth it ... certainly much more for those who do ... probably for those who usualy dont, but maaaaybe they could this time ... and i think from certain point of view for those who certainly wouldnt aswell.
