I have had my fair share of this issue, got the multiple .dll error pop up, thinking it was Direct X 11, my GTX 970, etc. Actually, my issue was the sound driver. Like most folks, i have an on-board sound card, and additionally my monitor has speakers as well, but i generally use a USB Logitech headset. For some reason, the game will every now and then, lose which one it wants to the sound packets to, which caused my crashes. In order to bypass this, I had to go into my device manager, and manually disable all others but the headphones.

After doing that, I no longer crashed in DX11 mode, like ever. In fact, the only time I've had issues is when the vid card driver is updated, which refreshes Nvidia's attached Hi-Def drivers, turning them back on. It's a pain, to be certain, but one I'm able to live with for now. I would like to see the Devs put in an option to change the selected devices in the game options menu, and to be able to lock it in as a choice. I would be willing to bet that this would solve a LOT of their crashing problems, as being able to select the wanted device shouldn't send packets to the wrong one anymore. Anyone with a switchable graphics card for their laptop should know exactly why this should be an option for everyone.

Hope this helps some folks, at least until these guys can get a permanent fix in.