You find the values here:
https://www.unrealworld.fi/wiki/index.php?title=WeaponsThe short sword has indeed the same attack&defence then the three best knives, but it's better than all the others. So maybe it's best left at that.
Regarding the Scramasaksi, you suggest to make the damage 2-4-3, instead of the current 2-3-4 (and of my proposed 2-4-4). This would make it worse than both the current and my suggested shortsword, but the best slashing knife available. It might make sense (also considering it would cost and weight almost half the short sword) but I'm not sure.
It's already most heavy and costly knife available, and three knives already have bigger stabbing power, so making it 2-4-4 might still be better (it's called a "power knife", after all).
Secondly, Should handaxes even be able to deal point damage, that doesn't make much sense to me, I have used multiple handaxes when camping, and I do not see how one would effectively stab with one. THe only example I can think of is if the handaxe had a a sharp point on the opposite side to the chopping bit. But as far as I know, such a thing is more for a war-axe, not as much for a handaxe. And as far as I can tell the graphic does not have such a head.
Yeah, it's weird. I can understand the sickle of course, and even the carving axe having 3 point damage (looking at some pictures online, the edge ends up in two points up and down, they could be used almost as a pickaxe). But the handaxe? Unless it's similar to this:
But even in that case, point damage 4 might still be too much. Maybe drop it at 3, so that the handaxe becomes 3-5-3?