I for one would be very glad to see Mike Brown arrive at the CBS - he could mentor Crossdale, keep him on his toes for the 15 shirt, and offer a solid option off the bench in case of emergency.
Are there "better options" available? Possibly, but are any of them a) available, b) affordable, and c) experienced?
Wasps need another specialist 15 ready for September, IMHO, be it Brown or someone else.