Very cool that each slice has a forward and reverse effect. Even better would be finding a way to install a "present" version for some of them, perhaps a bonus option if the chronomancer makes a natural 20 Spellcraft roll or uses a feat. An option to freeze the target for an extra second and use it to his advantage before the slice takes effect.
For example, moments of temporal space's present version could have the target confronted by a mirror image of himself, duplicating every move he makes but 5 feet in front of him, confusing or stunning him for the round. If it's a friendly target, the mirror image could act like the spell and create a concealment roll.