https://www.curseforge.com/minecraft/mc-mods/absent-by-design

Basically adds slabs, stairs, and fences, etc for blocks that dont have them

https://www.curseforge.com/minecraft/mc-mods/glassential

Adds in abunch of cool glass

I would like both for building and a good bit of Building Gadget 9x9 builds I like use them

Glassential is already on the pack and absent by design has been declined twice. You can get stairs for those blocks using blockcraftery.

#1597

#330