I know there are hoops to jump when it comes to provisioning updates over console, but with Steam we have an opportunity to test builds/new content before they go live. Incentivize test branch use with participation currency, run small tourneys offering small prize pools or inventory items. Offer currency for verified bug reports (first come, first serve). You'd be surprised if you make testing fun and worthwhile, people will more than likely partake and help you avoid QA issues with the rest of the community.