To give someone an S/SL4 rating there isn't even any need to include anything negative on FOCAL. That's why that rating and the ACT layoff around it was so screwed up: there was little consistency across managers around who got SL4s, especially S/SL4s.
So much work at Intel is far-removed from actual external customers and the real world. It's a world of internal processes and subjectivity. Who did better (or worse!) at revising Powerpoint slides for an endless internal funding process... or updating status reports for management? Who was late once for a pointless internal meaning because another meeting ran over? Uh, that guy. He gets an SL4 and the rest get an SL3. Especially if the FLM didn't like the guy who was late once anyway...