Less broken but also something else - twinned spell lets you cast two concentration spells.
So which concentration spells last until long rest? Only one a sorc can cast it seems is enhance ability which is good for a camp sorc.
But if you're gonna make a camp sorc, how about we abuse that twinned spell via multiclassing?
A camp sorcadin can twin elemental weapon. A sorcleric can twin shield of faith, barkskin with nature domain, and I can't really find any others.
