I think the new 4 mons are out of the Disney vault. In 10 minutes got a carnidos, combee, and shieldon in my usual gifts stop.
Or maybe I just got very lucky. I suspect they go through rarity phases and now it's rare instead of super rare.
Specifically for example:
1. In the wild - last community day at the Texas State Capitol building in Austin, which has visibility of stops and gyms of over 50% of downtown Austin, over the course of 3 hours I saw 1 glamemeow and 2 carnidos. Every stop was lit due to the population density and 6 hour duration, so basically per new mon it was a 1/1000 rarity.
2.
Egg rates.
-Glameow is now 2.7%, Shieldon 3.1% and Cranidos 0.8%.
-The rates of the last batch, like croagunk and Buizel, started similar and are now nearly 10%