Allowing client to edit slide content with Articulate, or hosting slide content externally

I'm a long-time user of Storyline, and one of my clients has recently gone through a series of branding changes which required updates to existing courseware. The usual protocol is that they send me changes, I make the changes and publish, they review and then have more changes, and after a few rounds of this, we have a finished product. 

My client has recently asked me how they can get more involved in the content editing, as the usual changes are simple and repetitive, and they'd like to be in control of the content process. I know there's no (easy) way to facilitate this with Storyline 2 or 3, but I'm wondering if 360 includes any ability for clients to log in and edit / manage their content. If not, does Articulate Review include any tools to help make the content editing process more collaborative? 

And finally, if not, are there any proven, reliable methods to connect Articulate 2, 3, or 360 slides with externally hosted content, perhaps with WordPress, XML, or some other technology? 

Thanks