I have a question about an extreme case of wheeling during a redirect.
Usually when I've seen people use a model like a Sabretusk to redirect a giant horde of infantry, they tend to put the redirecting unit at an angle to force the opposing unit to close the door into an undesirable position.
The thing I've always wondered, though, is what's wrong with putting the redirecting unit perpendicular to the horde as in Figure 1 of the attached diagram. (The black arrow indicates facing of the Sabretusk and the lines denote his front arc.)
When the horde charges, I'd imagine that many people would try to perform the charge indicated in Figure 2 which doesn't require wheeling (although there might be some required to maximize number of models in contact). But as far as I can tell by reading the rules, this charge is illegal. Most of the models in the front rank are in the Sabretusk's front arc, and so the horde would have to charge him in the front causing the enormous 90 degree change in facing from closing the door.
How does this situation play out? Follow up question: if it does actually result in Figure 3, why don't people use more extreme (ie 90 degree) angles to redirect when possible?