hmmm
I use rust monsters almost like as puzzles into themselves.
My party members rarely want to kill them since they are just 'creatures, in their habitat, or what have you'. However, they don't want to lose stuff, so they find ways to herd them, have them give chase, and have actually disabled a huge puzzle/trap chamber, elaborate one i had setup, via the rust monsters eating up all the trigger plates, etc..hehe it was great.
That said, we use a custom critical hit tables and house rules for item saves ,etc, so I will add the rust monsters current styled rust attack back in and my players will be fine with that
I hate nerfing monsters...makes it more like a stupid video game IMHO. I've never played with a party that had a problem with losing stuff; it happens. We've almost lost a vorpal sword in one campaign due to a low save roll (2E)...no big deal. it happens...
Same thing like spells like time stop, wish, disjunction or powers like level drain. They have their place, as there are creatures that my vision would have such powers...like in films where a person's soul appears to be drained away by some ghost or something. However, stuff like this can easily be house ruled; spells can be added back into the epic spell tiers, so not a problem.
But, I can understand this change for the new generation of players. Players these days are pampered i say...rust monsters that don't rust, beholders that don't disintegrate, dragons with no spells, balors & fire elementals that can be harmed via fire...what's next? an iron golem that will be hurt with i lob a pebble at it? or maybe a lich without spells
Sanjay