I think it will no longer be locked - just require a confirmation from the player after a spoiler warning pops up! OwO
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I really don't enjoy locked routes in games, myself. Much less being forced to play characters I'm not terribly interested in. So I thought it might be more effective to put the decision of play order back into the player's hands and just warn them there might be some spoilers for other routes in Lance's route.
(I don't think it will diminish enjoyment to play other routes first. It'll just probably diminish the "*gasp* OMG WHAT?" levels a little. LoL)
But if a player is fine with that, then I think it's nice to let them make that choice!