When search long only sometimes I want to do a light crosscheck of the strategy reversed to be short only. Also, sometimes for cross-checking on other markets I want to crosscheck for a EURGBP long only or short only I want to use xxxGBP and EURxxx for the cross checks to keep the direction and one part of the pair the same. There are simply no xxxGBP pairs easily available.
Both of these scenarios can be solved with reversing the market instead of reversing the strategy from long only to short only. I assume changing strategy logic would be more difficult to do automatically.