Controller support is better than at the launch. You can now actually switch tools and things using a controller. However there is currently a very annoying bug that causes RT and LT to switch their actions. When this happens you cannot use a controller to place any builds, and building is a big part of the game.

I just posted a separate thread on bugs talking about it since it's been a real issue. Some people say restarting the game fixed it for them, but I've had to reinstall it to fix it. However the past few times it hasn't fixed the issue. If you want to play with a controller I also recommend having a wireless mouse you can use to place builds if it happens.