CurseForge Link
https://www.curseforge.com/minecraft/mc-mods/timber-framing

Mod description
simple timber framing, but a medieval build style

Why would you like the mod added?
In E5 we had Structurize (dependency for minecolonies) that added these type of decorative blocks, would be nice to get some back.

Screenshots if applicable.

Thank you for the suggestion, I'll have a look :)

To be honest, if something like this was to be considered, I would go for Structurize (without the Minecolonies as it's not a set dependency).
Structurize adds a lot of other amazing building blocks along side the timber framing (it actually has a lot more Timber Framed Blocks) such as the Shingle Roof (hands done one of the best Minecraft looking roofs in the game) and just an overall good mod for builders.

I'm fine with that too :)

Didn't that have massive overhead when logging into a world? Or was it only minecolonies?

That was structurize. But as far as I know this got reduced down to like 3 seconds with a forge fix in 1.16.

Although I never tested that.

I just tested it with the dev instance, and it does increase the pack load time a little bit (no where as major as how it was in E5) and the world joining loads at around the same speed.

Will have a look at Structurize :)

I'm not a big fan of either Structurize or Simple Timber Framing, because I think adding so many blocks with small variations is an inefficient approach - It's pretty RAM intensive. I'm afraid this is a no.