Tim, tell your client that if he is worried about punishing the poor player with one only 200 off tee and one side more favorable than the other, that the poor player should simply aim right for the bunker, as they can't hit what they aim at anyway! And voila, miss the bunker have a nice second shot look.
Or, have that client go to any of the usual darlings of GCA.com in Nebraska sand hills. There are a wide variety of centerline bunkers from ones off the par 4 tee, to ones in the LZ of a second shot to a 3 shot par 5. They have them slightly off center favoring an easier side that is longer to green on slight doglegs, and shorter narrower side shorter to the green.
There was a photo thread on a Jim Enge course in CO with interesting elongated centerline bunker that seemed designed to get into the head of the longer player that normally would just blast it over the centerline bunker, but due to elongation and slope of FW towards and gathering into the bunker, gave that stronger player more to think about.
I don't think I ever encountered a centerline bunker I hated. I love the little pot on 13 Rustic Canyon that has a large gathering depression in FW into that little phonebooth size centerline pot.
I'm very partial to this centerline bunker, slightly offset on the 7th hole about 350 yard hole at Wild Horse, where the wider right side is slightly longer and open to front of the green second shot, to a fall away green, and the narrower side of the very slight dogleg left is shorter to green but has to go over another formidable left side green bunker. Rather than a pond, the wooga is up the left shorter narrow side. In this photo that is in my Wild Horse write-up here on GCA, the very golf course designer and builder responsible for that delicious centerline bunker happens to be entrapped in his own creation.
That is the elusive and rarely seen, Mr. Dan Proctor enjoying his work. The boys gave us a number of interesting centerline bunkers at Wild Horse, and you should send your client there!