A friend of mine freezes his light lagers solid, then thaws before drinking. They are very clean (which he attributes to freezing), but I’ve never had the frozen/unfrozen versions side by side for comparison. You’ll definitely be able to drink it once it’s thawed. If you start drinking it before it’s totally thawed you might get an interesting first couple of pints, but you won’t want to finish the keg I think.
I froze a keg of amber solid once. I thought it had thawed completely (it hadn’t) and I got several pints of what resembled bourbon infused beer. Woowee.
Then the keg thawed completely and what was left was remarkably like Schlitz.
OK, it’s not in the keg yet. It’s in the bucket. I will thaw and keg. This is also an attempt, again, at gluten free beer… Waiting for more test strips.
Keg, bucket, whatever. As long as it was done fermenting (and presumably it was, because you were crash cooling it) then keg/force carbonate it when it’s thawed. Then get back to us with the taste