But on the arcane side you get access to Trapsmith spells! Greater Dispel Magic as a 3rd level spell! Haste as a 1st level spell! The ability to make the cheapest utility items this side of a zeroficer!
I'm not saying you won't miss a few things, but you get similar goodies on the divine side. Greater Dispel Magic as a 4th level spell, Lesser Restoration as a 1st level spell, Hunter's Eye, Favor of the Martyr.
Don't get me wrong, I'm a big fan of Arcane Focus, but until you can do both/get access to more spells, I think divine has the edge.