I think it needed excessive testing in real match situations on all levels to really see the implications of such a change. I think it's possible that things could shift a bit too much in favor of the server, but on the other hand, it would be a matter of how well a receiver can adapt and develop better/faster recovery for long serves. Maybe a combination of getting rid of the doubles service line but limiting the serve to be inside the singles side lines to avoid the ultra-deep corner serves? Would be fun to do some testing there. If we were allowed to... darn it, it's now full 5 months since I last hit a shuttle. Unbelievable.