This is kinda something I have noticed so far as I've played 10 but the stone tools while having much better models seem to break way too often and consume more calories per strike than they used to.
I would personally like to see them be just a little stronger/longer lasting and the calorie amount with them seems very very heavy and intensive; as in I can only successfully cut a single tree down + clean up its debris and stump before the stone axe is practically useless and needs repairs.