Fedora 25 should not be broken so those problems should have been thought and investigated before pushing this package (and mesa) ahead
I've not yet understood what exactly created the problem and therefore I have no idea what to say to upstream (if you have, please submit the bug)
@hansvon said that Steam is broken with Intel hardware. The fact that it works with your Nvidia card does not really count as "hansvon problem is not a problem"
@jwrdegoede: The fact that you have never heard of a package does not justify you to break it. Also the fact that you say is a nece (without data) does not justify you to break it.
Said so, I'm open to work with you to make adjustments to sway code or packaging to make glvnd not breaking it