I think i replied to a similar thread yesterday but
IMO with staff level is the most important thing
Experience, Morale & Charisma may matter, but they in no way make a difference towards actual "level"
2/3 ways to look at it
1/ The spidergraph serves no real purpose, other than a visual aid [and so you dont have to show boxes for 3 skills]
2/ the graph is relevant [but only between staff of the same level]
A Bad Doctor/Designer/etc/etc is still bad, even if they have 20years experience, are happy & have the charm
[heres my doctor] -
http://igpmanager.com/play/?url=team-staff/48288