One of the previewed suggested versions of Backgrounds by Rob make my optimistic. And by the examples "Thief+Pick Pockets, Stealth, Streetwise. Soldier= Endurance, Intimidate, Survival", it looks like the skills are split up evenly between the backrounds.
Personally, I'd make make 2/3 of the background to have parity.
1 Knowledge Skill (Arcana, Dungeoneering, History, Nature, Religion, Planeslore*, Streetwise)
1 Exploration Skill (Acrobatics, Athletics, Concentration, Endurance, Heal, Perception, Streetwise, Pick Pockets/Thievery)
1 Social Skill (Appraise, Bluff, Browbeat**, Diplomacy, Insight, Intimidate, Logic***)
*Knowledge (The planes) renamed
**Browbeat is Cha based intimadation. Intimidate is Str based intimidation
***Logic is Int based social defense
Personally, I'd make make 2/3 of the background to have parity.
1 Knowledge Skill (Arcana, Dungeoneering, History, Nature, Religion, Planeslore*, Streetwise)
1 Exploration Skill (Acrobatics, Athletics, Concentration, Endurance, Heal, Perception, Streetwise, Pick Pockets/Thievery)
1 Social Skill (Appraise, Bluff, Browbeat**, Diplomacy, Insight, Intimidate, Logic***)
*Knowledge (The planes) renamed
**Browbeat is Cha based intimadation. Intimidate is Str based intimidation
***Logic is Int based social defense