See my earlier comment (https://news.ycombinator.com/item?id=6841944) for more info, but yeah, we agree.

With most of our open-source projects at HubSpot (http://github.hubspot.com), we've tried to keep things modular and small, doing one thing as well as it possibly could be done.

Adding filtering and searching (fuzzy, regex, etc.) is definitely something we'd like to add. (https://github.com/HubSpot/sortable/issues/4) ;)