The Kate isn't a level bomber and its still faster than the Ju-87G-2, though not by much.
ack-ack
It has a bombsight for level bombing, therefore its a level bomber, Like the TBM, but I get what you're saying.
It could be used as a bomber interceptor in AH just like the IL2 can. Except when has anyone seen an IL2 do that? Furthermore, the IL2 armor piercing rounds appear to do not nearly as much damage as an explosive round, and seeing as the G-2 also uses armor piercing, we're looking at an awesome round that essentially is not effective unless it hits a critical component (unlike a tater for example)
On that idea, I am reasonably convinced that that IS modeled in AH. For example Taters do "splash?" damage due to an explosive round, but armor piercing do not, hence how less effective they are against aircraft. You can see this by landing a 30mm near a target but not hitting it, and watching your target explod, VS putting an il2 round in the same spot and watching the target take no damage.
Edit: So no, a Stuka will make a terrible bomber interceptor even in AH.