A nice improvement (and a need for us) would be multi-currency support.
Matt from Shopify here, hope you're having a great week so far! I've submitted this as a feature request on your behalf to our POS dev team. :) If/when it becomes available, you'll be notified directly!
Matt Sharpe l Shopify Guru
In other words, don't hold your breath. Issues have been piling up for a year and Shopify POS development team is completely AWOL. Shopify helpdesk acts more like a gatekeeper.