This would be great.
I highly doubt that, otherwise they would have announced that in the ViDoC already. The expansion focuses on new things to add, not to entirely rework ALL subclasses they obviously spend over a year to make, balance and find perks for it which work perfectly together within a certain path. As right now, a free perk selection (D1 style) would break the classes on several levels because they were not designed that way for D2. D1 on the other hand WAS designed for it (they nerfed several combinations since a majority only used meta combinations though). But heh, who knows?