The title says pretty much all, back in pre-2.2 assimilating a specie into cyborgs/synths or psionics wasn't such a big deal, sure some unhappiness and maybe a little bit of unrest for a couple of years but that was all, 25% unhappiness wasn't that bad. But now not only pops get that 25% malus, which is already very heavy in 2.2, but they also get the 30/40% unhappiness from unemployment (unless of course you set them on social welfare, good luck with that if you are authoritarian). Worst of all, if you use assimilation on a planet in which all pops are to be assimilated, you can't even use martial law to contain the instability since no one is able to work and the pops will be even more unhappy since no one is producing amenities! But wait, there's more: since pops are assimilated in a random order, most jobs are going to be screwed up with workers finishing their assimilation before rulers and specialists and stealing their jobs!
I hope they're gonna do something about it because right now, if you're going to go for a full scale assimilation, you'd better use some resettling or directly prepare an army in orbit for when the planet is going to revolt.
I hope they're gonna do something about it because right now, if you're going to go for a full scale assimilation, you'd better use some resettling or directly prepare an army in orbit for when the planet is going to revolt.