The good news is that Caitlin and Team Flash figured out what he was up to in time to stop him, although he did escape.
Caitlin doesn’t have him on hand to try and restore her father, but she doesn’t have to worry that Icicle will be able to get rid of her dad entirely.
Unfortunately, she later discovered that Icicle was using her to develop a treatment that would allow him to permanently suppress his Thomas Snow side, which would have effectively killed what was left of her father within Icicle.