Dancing Hoskuld
Deity
They get research like any player (at least I did not find anything that prevents them to when I checked the code). The free beakers are in addition to that.
I'd say remove the normal research gain but change the free tech to only require half or two third of all civs to have that tech (so it ignores any minor nations).
Minor nations are supposed to start with techs so that they can survive - ie st least as good as the barbarians. Perhaps this is the way to go when creating nations from barbarians, start with what ever techs the barbarians have modified a bit for the nations that know the new civ - a barbarian city needs to be known by a number of civs to become a civ.