Have the previous new levels been so... rough?

I came in when the first episode was completed, and it played real smooth, but I've had a lot of bugs in chapter 2. Is it usually rough first and then they bugfix and smoothout the kinks, or is this "weird"? Maybe its a big change releasing multiple levels at once, they each need polish time and they havent gotten that yet.
Gameplays great, lovely improvements on weapons/combat, fun levels (even if i think tighter is better and cars don't really do "tight") and I will play through it (even if it's really annoying to get a delia that is sideways/upsidedown after a reload by the mine and then she dies from a killbox under the level, forcing me to restart chap 2 when almost complete)