Hi Nathan
Thanks for the reply, indeed we have also seen the Mobile V2 work and the V2 API calls. We've dabbled with this type of thing also when building Community widgets outside of Lithium.
However there are caveats and some operations (such as those you find in the Topic Options drop-down that are not possible via the API (yet in V2). We intend to explore these and document them here. We'll also prioritise these (maybe via Ideas) and hopefully get Lithium to address the critical ones in expanding the V2 API.
Being able to quickly build out a light-weight front end that supports 80% of Lithium functions such as navigate, read, reply, post, kudo, tag, mark solution, label, subscribe, read / unread, search et. al. means we can tailor ad-hoc community channels without having to create complete Lithium themes / sub-themes.
Updates soon..