MultiMC
Adding uncompressed resource packs via the instance editor
Some artists have been known to distribute resource packs uncompressed and unarchived in a folder, and this is supported by the engine. However, MultiMC's "Add" feature in the Resource Packs section of the instance editor only allows addition of ZIP and JAR files.
The most straightforward solution I can think of is to allow this is to add the file extension .mcmeta to the Add Resource Pack dialogue and on that filetype copy the entire parent folder with its contents into an instance's resourcepacks folder.
Distributing packs uncompressed is a bad practice and should not be condoned.
That when you are working on one of those, it's easier to work with the exploded version of it, rather than a packaged one.
Working with folders is easy. You can init a git repo in there, version the resource pack and it's in general, nice.
I'd rather go in the direction of supporting this better than not.
Maybe not directly importing uncompressed, but having a parameter in the meta to decompress it. Would also be nice feature for importing worlds.
And there seems to be a bug in Minecraft that some packs doesn't work in compressed form, but work as folder. (e.g. Faithful 1.15)
There's also a bug related to this: If you put an uncompressed resource pack in manually attempting to copy the instance fails consistently
