If i make a modpack and send it to my friends, they then import it and play. Whenever i make an update to the pack, it should auto sync the new mods with everyone who has the pack rather than everyone having to import the new version every time there is a change. :)
If you wish for your friends to get updated versions of the modpack you created, you need to upload it as a project to CurseForge.
Auto-Update Feature for modpacks. Merged
A way to make a modpack private but shareable. Merged
Allow updating of custom profiles/modpacks instead of importing as new Merged
Modpack game version selector Merged