>> when DA does a heck of a lot more?
Define 'heck of a lot more'?
For elemental absorptions, max YS is essentially the same increase as DA.
For physical absorption, max YS is half the increase of DA.
YS drastically reduces the hinderance of a piece of armor. DA does not affect hinderance.
DA increases the protection of a piece of armor. YS does not affect protection.
The duration on both spells is very comparable.
Unless I am misunderstanding 'heck of a lot more', I'm not seeing it. And I don't think it has anything to do with global caps.
GM Damissak