@Ched80
Quote: "There is also CorVus mod which is very up-to-date."
Haha, thanks, I try to keep my stuff up-to-date.
@unfamillia
Quote: "* How are people finding the 'new' update (V1.19)"
I personally have no problems with the update, many are complaining about performance, but v119 wasn't focused on performance, it was mainly a massive feature update, v120 is focused on performance. And I can give you the latest version of v120 if you wish.
Quote: "* What is/are the best mod(s) for a puzzle shooter?"
I would say RPG mod, as Ched80 said. It is probably one of the greatest FPSC mods ever made, right up there with Fenix and PB. Graphics-wise, I would say CorVus, but you're not looking for graphics are you :p, plus, CorVus is currently very buggy (yes, I'm the current maintainer of it, but I'll still admit it) and I wouldn't really recommend it for a game until I have the weapon fix released.
Quote: "* What have people found X9 struggle with?"
As BlackFox said, the memory cap, but also performance, but there is a simple fix for both of these things.
Open setup.ini and change these values:
systemmemorycapoff=1
postprocessing=0
Only disable post-processing if you don't want fullscreen shaders.
Welcome to X9.
-TZK