Just curious on thoughts of how should work in the game. A sage podcast said 5e doesn't have facing. I think facing and distraction is part of role playing sneaking past some guards. Or waiting for the guards to go on patrol. You select the least stealthy party member and give an area for the enemies perception check. When you try to sneak (at least out of combat) you get green area (don't attack, cast a fireball etc) you can pass safely. Amber the npc get a perception check against everyone's stealth. And red only invisible, or gloom walker Rangers, etc can try to sneak past.
Maybe similar in combat so your halfling can move behind the barbarian and he checks, finds he's in amber (or red?) then can try to hide.
The colors would represent partial or fully obscured, the creatures awareness. Your stealthiness.

Thoughts welcome. What crpg has done stealth well? How should it be implemented? It should give stealthy characters a chance to shine (but not I'm always invulnerable in combat)