Something like that is likely out of scope for what this add-on is meant to provide. This add-on does, however, fully use XenForo's attachment system so it should support any file stores you may use. XF2 does use Flysystem, so from my understanding it should easily (or at least relatively easily) support any file store supported by Flysystem. This thread has a bit more information
One thing I don't understand.. This isn't really the addons "fault", but more on kraken. I still get "you need to optimize your images" whenever I do the gtmetrix speed test, getting an grade F there.. Isn't kraken optimization good enough?