There's been something of a spike of interest in hedgehogs and their spiny status lately but at this point it's worth noting that the status as is isn't worthwhile at all because it will only do 1 damage to unarmed attackers.
So why not have a bigger, nastier hedgehog monster with the Super Spiny status that will return a portion of the damage done to it.
As far as concussion weapons go, I think a flashbang grenade that induces area confusion would be an interesting addition. Confusion being another under-used state.
Not so, Izzy. If you find an old bones, but then that character also leaves a bones, that will generate a new bones file. So even if your original bones was from 2005, if you've found it with a later character from, say, 2010, the time-stamp on the file would be 2010.