Le's see... the metaworm's already adapted to drill hard materials. What's available in its new home? Concrete slabs? A toilet? My money's on psi-morphic toilets. And don't give latchers to anyone, they smell worse than rathounds.
Makes me think of this toy from the 90s (image attached).
You learn this by experience. It's part of the fun.
I have to say, I found stumbling through the game the first time pretty great; I played on Normal but I was getting my ass kicked left and right for most of the mid game because I allocated abilities incorrectly for a sniper (only realized I should be putting points into PER later, didn't start putting points into crafting until lvl 19, didn't figure out that armor penalty was messing up my stealth until I got the rathound suit and noticed the difference).
It added major tension to all of the exploration (especially re: crawlers, murderers and muggers). I was only able to squeak by 80% of the fights by cheesing them with traps, LOS peekaboo, and fire bombs (which often ended up just setting me on fire instead) and if they ever got off one shot I was toast.
Oh, another thing, somehow I didn't realize I could use shield emitters until like level 17 or something, haha.
Oh, and speaking of the rathound regalia, I really liked having rathounds friendly. Even though they're not talkative, I feel like they're givin' me moral support. It would be cool if there was another ending option where, if you have the rathound suit, you could just settle down into the rathound cave of DC for the rest of your days, living as one of the filthy pack, haha.
I mean, considering how long my character was wearing that darn suit, he'll probably never get the smell of rathound off anyway, so might as well embrace it!