I don’t know, my recent replaying World/Iceborne when I was preparing for Wilds I didn’t think the actually story mode was that long.
Time from the story to Xeno'jiiva in high rank and same with Shara Ishvalda in master rank weren’t all that long, I think it was those special Investigation you had to do in between that add to the length.
Maybe I got through them faster?
World was definitely longer than 12-15 hours, there was some padding but tbh, finding traces of elder dragons gave me a sense of hunting so it was not boring, i was hunting other monsters while picking tracks, it's not like you had to just walk and find tracks, you could play in multyplayer or solo and find tracks organically.
I take that over something you finish in a short weekend.
And not having high rank monster during the campaign is a huge miss for me, i don't know you people but the first time you fight a new monster is always more magical than the successive hunts, so i wanted to have at least half the fights in the campaign in high rank, instead of having to kill monsters the first time in low rank and then having to hunt them again in high rank, first time is special and i wanted to have a resemblance of challenge for the first kill.
But noooo, better to fight every monster in kiddy mode for the first time...
After the beta i had the sensation that wilds wasn't quite the same magic experience of world, i made peace with myself, world was a genie in the bottle moment for me and it was not easy to replicate, but fuck my ass capcom is actively doing everything in their power to make that sensation a fact.
How the fuck do you make an open world game with a way smaller campaign than a non-open world game? Fucking how?