It’s not meant to be a clone of the ‘current’ item browser, though you can use it for that (‘less easily’), or for much more (‘unique feature’).
Functionality-wise it’s at what I want it to be (given my despise of JavaScript ‘frameworks’; I always wanted sortable/filterable tables… :/). Current work is on making it easily accessible. Point here is for you to have something useful (especially for modders and tile artist), and for me to get feedback from you.
Feel free to file github issues (the preferred way), or you can always leave me a message on IRC.