Yep, it feels right to me for them both to be cut off from the Force, for the reasons above and more. The biggest reason for doing this, however, was so that the story could come back around to Rey. Every scene in the previous version was centering on Kylo and it was becoming the Kylo movie instead of Rey’s movie. Now she’s making a decision and suffering the consequences, and precisely when she should before the start of a new act. Now that both are ‘normal’ people there’s the possibility that Force Ghosts won’t be able to communicate with them, and it becomes much more important that they seek out the Knights of Ren as the last remaining known Force users in the galaxy in a desperate bid to turn them back to the light and restart the Jedi Order.