I tried a Frost sword briefly, but found it made fights too easy, so avoided weapons with that bonus. Some people playing mages find a Frost weapon great as a backup if opponents get too close or they run out of mana at a bad time (or a couple places in the game where magic is blocked).
DD does tend to get easier as it progresses. Even without Frost, the imps (etc) in the wastelands only lasted 2 or sometimes 3 hits for me. I bought lots of charms intending to use them later when I had good equipment I would be keeping for awhile, but by that time I didn't need any extra help (gold is easy to come by, though, so I kept buying charms).
I compared BD and DD in the topic
Beyond Divinity available for download!.
