Finaly you cleaned your image after that fireship incident that made Great Britain lose Castries after 15 PB's. Maybe what you do best is screening. Congrats.
That's the theory and I agree with you... but in practice, the majority of new players don't use this forum and read those fine advices. They will change to the top nation that provides better chances (provoking some unbalance) or they will quit.
That only works without nation and global chat, "radio comunications" in this game is already a big help, if used to locate battles... will be a big mess.
I made another test and found your problem in OW, at 15 degrees does 4 knts, but at 30 degrees does 14 knts. If you want a sail boat to go fast against wind maybe you should use only the motor.