None of which are enough to call 2.2
None of which are remotely game-breaking, except the AI stuff.
Tim you can find hundreds of examples in the bug reports forum. Bugs range from War Exhaustion being calculated incorrectly to end came crises not working. There are multiple bugs that will affect most players, and numerous bugs that make specific playstyles and events impossible or not working as intended.
L-Cluster not working properly: https://forum.paradoxplaza.com/foru...cluster-outcome-not-working-properly.1135092/
Prethoryn scourge not attacking worlds, and worlds claimed aren't affected by the scourge: https://forum.paradoxplaza.com/foru...horyn-scourge-is-dormant-v2-2-3-1960.1142590/
Terraforming planets clears blockers without returning locked districts: https://forum.paradoxplaza.com/foru...ai-tech-terraforming-bugs-2-2-2-5b48.1143285/
Multiple issues with synthetic ascension:
https://forum.paradoxplaza.com/foru...rced-build-after-synthetic-evolution.1143343/
https://forum.paradoxplaza.com/foru...ps-cant-fill-ruler-roles-v2-2-3-1960.1142589/
Fleets failing to engage in combat: https://forum.paradoxplaza.com/foru...ellaris-invincible-fleet-v2-2-3-1960.1143281/
Immortal leaders dying of old age: https://forum.paradoxplaza.com/foru...ris-hive-mind-leader-dies-2-2-1-bbf4.1134534/
War exhaustion calculated incorrectly: https://forum.paradoxplaza.com/foru...orrectly-not-all-ship-losses-counted.1142792/
Authoritarian faction hates robots: https://forum.paradoxplaza.com/foru...ude-annoys-the-authoritarian-faction.1143196/ https://forum.paradoxplaza.com/foru...g-ai-servitude-as-slavery-2-2-3-1960.1142776/
Vassal of an enemy has open borders that can't be closed: https://forum.paradoxplaza.com/foru...t-close-borders-with-vassal-of-enemy.1142786/
Synthetics have access to and build farms and farming tech when they do not need it: https://forum.paradoxplaza.com/foru...tellaris-2-2-3-robots-spamming-farms.1142756/
Megacorp vassals of other Megacorps can't build branches in ruler's planets: https://forum.paradoxplaza.com/foru...-branch-offices-in-overlords-planets.1142616/
AI strategic resource management is so bad that AIs fail to upgrade fleets and buildings when strategic resources are used, causing their economies to stall and fail. Also happens with Fallen Empires, especially when they awake. https://forum.paradoxplaza.com/foru...tellaris-2-2-2-awakened-fe-braindead.1140433/
And other issues I'm aware of but didn't see the threads for:
-Species within an empire will always grow to equal populations, regardless of all settings and traits
-AI is unable to manage effective construction on their worlds, often leaving districts and buildings empty while overpopulated
-Pops are not reasonably assigned to jobs, with pops specifically tailored or robomodded for specific roles not able to be assigned to those roles. Makes robo-modding and gene editing next to useless.
-On launch (and possibly still) there's a market exploit allowing infinite resource gain
-Synthetic species playthroughs are unbalanced, with the use of the bioreactor needed for Synths to come close to parity economically.
-AI war strategy is non-existent. AI regularly sends fleets clear across my empire to target minor, unimportant outposts.
None of which are remotely game-breaking, except the AI stuff.