First of all, I want to mention the people who had arts which I used in my thumbnail for the modpack!

Teacup - HorizonAtha_ (https://www.planetminecraft.com/member/horizonatha_/)
Font -  Craftron Gaming (https://www.dafont.com/minecraft.font)

This modpack includes mostly performance mods, such as ImmediatelyFast, Sodium, EntityCulling, etc. with some focus on memory usage such as 'Fix GPU Memory Leak' and 'CPU Usage'.
Also some quality of life mods for the UI, animations and feel of the game all together such as 'JEI', Xaero's Minimap, BetterF3, Jade (+addons), Fresh Animations (+extensions), Drodi's Villagers (+extensions), etc.
The biggest changes that are made to the gameplay are mods such as Create, Immersive Aircrafts, Let's Do Series, Farmer's Delight Series, YUNG's Better Series, Friends and Foes Series, and the biggest one, 

Kingdoms: Villager Retaliation!

That's pretty much it, hope you guys enjoy the pack!