This is modpack but with Origins+ that I made for my friends and me to play.
What you can expect:
Classes and Races via Origins
Lots of new building blocks to play around with
Worldgen via Biomes o' Plenty and Terralith with some updated vanilla content generations (YUNG's better Dungeons, Mineshafts, etc)
And plenty of QOL stuff that makes it not boring, but it won't overwhelm either.

