well considering the whole rule changing thing with everything being under the "Trainer" umbrella (trainers,supporter,stadiums etc) the use of trainer lock may increase, though hopefully they will errata Vileplume UD and Gothitelle BW poké-body/ability so that it isn't so over-powering, especially Gothitelle seeing as it could possibly stop your opponent playing any T/S/S but you're free to play them as you please.