well increasing magic up to or close to ja proc would probably increase the number of jobs you could do dynamis on rdm pld whm and blu would get alot more common, and would also increase the number of soloers a zone could hold, and maybe decrees some of an animosity targeted at bst, the dia spam issue would favor rdm(refresh2) seance most other jobs could drain there tank dry solo even just spamming dia (most mage jobs going to have to be using pdt and dd gear lowering there refresh slots some) or in blus case something like sprout smack(yea i know foot kick is cheaper, but sprout has a lower set cost, and an ok slow).
ps forgive my spelling no spellcheck >.<