While thats true (Im a dwarf player myself), cavalry isnt that dangerous for skaven as it is for dwarves. Just because you have everything you need to counter them, you have the command bonus, you have the numbers and you can pursue them at any time.
As for the swarms, they can save you the game if they just hold the breakpoint up, there is plenty of other stuff that can do the fighting.
Also note, I was just stating my opinion and have no intention to change anything. (Mostly because this "issue" was discussed to death in our group.

)