Yet the big bang was tearing him apart and putting him in extreme pain, so clearly if he could barely survive being in that, universal shockwaves would do at least as much, and this was casual Beerus, and they extended beyond just the universe and to other world and kaioshin realm. So I still think the shockwaves will be to much for him alone.
I agree it does not make him slow, but it does mean he can't use his top speed instantly, or as combat speed.
Thing is Beerus can fly almost as fast as Whis, who I talked about having shown being able to react at those speeds, and we have seen even in flight things like Beerus and Goku flying around the planet exchanging blows, and all through the series this kind of relationship in speed has been shown so the past showings of combat speed > travel speed alone is not enough proof, but it makes it more likely that is the case with Beerus just like every other character, and taking all of it into consideration with beerus and Goku fighting traveling around above the planet, whis and vados intercepting each other, there are multiple things that imply his combat speed should be equal or better than travel speed, and nothing to suggest otherwise.
Surfer has never shown to have equal combat and travel speed though, and tom Brevoort has even stated that in marvel most of the time combat speed =/= travel speed, so surfer really is not implied to have equal combat speed, the opposite in fact.
