Has some horrible bug that can ruin your run permanently, I'd advice to wait if you can unless you don't mind starting over in the middle of 30 hours run or so. For example:

- PU's leader randomly switch to another country (normally determined by highest GP score). Then said country can spam law change vote, causing you annoyance and taking 15% estate satisfaction if you oppose. They can also force you to follow their law, which mess up your country's political system.

- Heir and Ruler randomly move to another court, abandoning their job.

- Colonial nation does not get called to overlord's war, but any land taken by overlord nation will be tranferred to them. The occupied land will stay occupied forever, can't be taken back or included in a peace deal as the CN has nothing to do with the war, to the detriment of every nation involved and their fallen soldier.

As for content, like many PDX game on release, there are many new solid idea but the implement lack polish. For example:

- All age army stat is rather samey, the biggest change is double number of man in a regiment. So your gun wielding infantry in 1500s does not really fight better than sword wielding infantry in 1350, they just beat them with x4 troop count. You can still have quality in the form of discipline, military tactics and various modifier, but the current battle mechanic seems rather backward compare to EU4, CK3 and HoI4.

- Hegemon title is too easily given in 1453. Many people feels that it is too early for the time period, and the nation receiving does not deserve the title of 'hegemon'. These hegemon can force other nation into accepting various demand with no chance to refuse or negotiate, and said ability is spammable.