You don't need to stir with conduction - it just helps cook things faster. If you take your time with any conduction device it will fully cook the herb.
Unless you really don't like the design, I say just keep the device and enjoy it. Every vaporizer performs differently and it's good to switch between them from time to time to avoid building up a "vape tolerance". I rotate devices twice a year specifically for this reason.
Xmax has a pretty good reputation. They've been in this industry quite a few years now, and I know for a fact that they listen to the complaints from their main vendor partners here in America and modify/revise the designs as needed. One of my contacts and good friends who works at POTV is responsible for beta-testing all new devices before they're added to the storefront (he has basically every device ever made over the past 15 years, as well as many prototypes that never hit the market) - he personally has provided feedback to Xmax and had them make changes before even the Starry3 hit the market a few years back.