As people will use more often Spiritomb as a starter because of the stage 1 and 2 decks, the trainer lock problem will be an even greater body, with the lose of BTS. With this going on, people will not be able to use bug catcher to disrupt and use rare candy to get the stage 2 rolling. If your opponent is slow down, why not bring a vileplume to keep the lock? Therefore, trainer lock will rule, because of the lose of BTS and the unplayable Rare candy.
But, because of that, people will mostly play starters to keep the speed.
some are mentionned below:
spiritomb
smeargle
jirachi
skarmory
even the promo Dialga SV box