Zoltan is 10 for 12, which provides 3 dwarf bodies for row synergy and possible fodder for Munro. If you're playing him with Munro, you are not boosting the rowdies with him, because if you are, you're losing points. Munro is a 6 body 12p card that will brick if there are no rowdy dwarves (which are 2-body and very easily removed) on the board or will play for SLOW 16 over the course of 4 turns and under perfect conditions (meaning you have at least 4 more turns and the opponent has no armor on the board.)
Vern, on the other hand, is 11 for 12 and 3 elf bodies (and deadeyes are better bodies than rowdies, for obvious reasons) for isengrim and yaevinn, OR, with Feign Death, provided it sticks, and leader charges ALONE, will hit for 17 (12 removal) immediately, and if you manage to have Eleyas and/or Half-elves on the board, that number goes up another 6.
Ithlinne was expensive at 11, but a lot more reasonable at 10. When it "bricks" it plays for 9, when it hits, it play for 13. That's value.
Toruviel is easy 9 for 8 and in this meta it's not that hard to hit her ceiling of 14. That's value. I'm starting to wonder how much ST you actually play to make a categorical - and wrong - statement like "It doesn't get play in any ST deck." You know who doesn't see play? Munro.