Implement the sys.dmdbstatsproperties DMV to expose the modctr to get a better idea of when stats should be updated. using stats_date isn't a complete solution. as you have no idea if any rows have changed since that date
Thank you for all the feedback folks. We are continuously improving the manageability experience with SQL Data Warehouse which includes automatic statistics. We will reach back out when this is on the roadmap and can share when we have an update.