In Patch 10.2, unallocating points within Dragonflight talent trees will no longer remove points from dependent talents further down the tree, making small adjustments to specific talents much easier!
In the live version of the game, attempting to unallocate a point which is required to unlock or directly connected to others further down the tree will unallocate every point below it, requiring players to then re-allocate several additional points further down in addition to the one talent they actually wanted to change. To work around this, some players use convoluted solutions to unallocate non-dependent points, assign new ones to avoid breaking the tree, then remove the undesired and now no longer dependent point, and reassign the originally intended points — sometimes assisted by WeakAuras to highlight points they can safely remove.
On live, respecing Bitter Immunity to Storm Bolt is an arduous process that requires unallocating non-dependent talents to avoid breaking the tree, but the swap becomes much simpler in Patch 10.2 due to only that one point being removed.
No functionality is lost, however.