Howdy.
1) Revival 1.5b is the beta release of Revival's 1.5 patch,which was released to the founders some time ago.
2) Unfortunately,due to it being in beta it's only available to the founders.It has to become stable enough for an official release before becoming available to the public.
3) Differences from 1.2.1 include a bunch of new items,mythic and double-edged item qualities,new cube recipes and the ability to spawn some minions in stations,among other things.Too many to list really
