Yes, please.
It's silly and exploitative you can circle behind someone in melee and "hide" before attacking them to always have Advantage. That one is silly even for Rogues. Same with ranged attacks, Hide is basically a free Advantage button you just press before attacking and it has nothing to do with actually hiding.
The "vision cones" should be 360 because hearing is also a thing against sneaking. A PC with -1 and Disadvantage in Stealth has no business sneaking behind everyone with a 100% success rate. Or at least add a hearing radius in addition to the vision cone, which really still should be 180 degrees wide.
