What exactly determines the tech level of a nation released after a rebellion? I've had games where rebel nations have been released as a tech level 5 nation in the 18th century, but others have been released at (or near) the tech level of their former sovereign.
It's pretty frustrating to try to cripple a rival by encouraging a colonial uprising, only to have them be released as a society that hasn't even discovered gunpowder in 1760
It's pretty frustrating to try to cripple a rival by encouraging a colonial uprising, only to have them be released as a society that hasn't even discovered gunpowder in 1760