Focusing on divine means you can use Divine Metamagic and don't have to bother with Extra Spell cheese, you simply have all spells by default. There are also more classes with discount spell lists for the divine side then there are for arcane. When it comes to Chameleon, I'm pretty sure divine > arcane, specially once we remember Divine Bard and Shugenja are around.
Add to that domains, paladin, ranger, and adept spell list. The divine chameleon is not hurting for good spells to cast.