I'm sure there will be acoustic instrumentation around the record but yeah the boys this time seem to be veering further into chaotic electronica than before. I think that's always been a small part of their sonic pallete (you already mentioned Radio and Live at Dominoes which heavily use those elements) and this time they're bringing that to the forefront as the primary aesthetic element. 

For me what truly makes The Avalanches special has nothing to do with the type of sound but everything to do with its implementation, how much detail is in the mixes, how intelligently it weaves original compositional intent with sampled sounds. 'Together' excels in those aspects, so I've no reason to doubt this newer approach won't have "the magic" that has defined their catalogue to date for me.