Microsoft has dozens of game studios that enjoy using Blender, and no competitor in the space (not recognized as a profitable business). Finding negatives to this move is being too paranoid.
This tells me you may not have been keeping as close tabs on industry practices. I can tell you personally, this has been rapidly changing over the past few years, and it's taken a lot of people by surprise. I can't say it's supplanted Maya yet by any means, but that software's quickly being seen as old-hat by each new wave of gamedevs. It's fascinating to see.
and I've been around long enough and been stung hard enough and enough times by MS[0] to say that not expecting negatives in this risks naivety.
[0] I've just wasted 12 hours trying to install visual studio and that's their own bloody product!
Apparently LunarG SDK was the best they could make, which is quite telling.
Love how Vulkan extension count keeps rising every couple of weeks, not long to catch up with OpenGL 4.6 extension jungle.