The box of grenades is basically a Victor Bounty hunter shot with no cleave. for QoL, it should cleave and keep going instead of stopping on any little arm or leg of a basic pox walker or enemy.
The briar thorn javelin used to obliterate hordes with a spear cleaving through multiple models. This huge damage limited item should really keep going.
I like the perk where it cracks open, but honestly, think that should be standard and not require a perk.
Would also like several options (picked before mission perhaps.) The box would be 1, a bowling ball or shot put (to do what you mention) would be 2, perhaps with a big single explosion, and lastly a mortar shell.
I actually found a box of the last grenades, but it wouldn’t let me throw them. Sadly.