Thanks for the feedback. While we are always looking for ways to improve our One-Click apps, Magento 2 does seem to require quite a bit more in resources than previous Magento series. That is why we have disabled the ability to create 512MB Magento Droplets.
One thing to note is that Magento is installed in "default" mode. While this is a good default, it is not completely optimized for production. Enabling "production" changes a number of settings, including only serving cached static assets, that may speed up page views. For more information, see: