My concern with errata and other downloads, is the opening of pandora's box to what it leads. I play competitively (ie tournaments). I hate having something apparently contradictory (to me at least) to the RAW being available to those that follow this sort of thing on various internet outlets.
FAQs
Having played for 15 years now on the comp circuit I think some sort of FAQ/clarry is a good thing and needed however hard you try. It is simply that in friendlies people tend to give way easily or chuck a dice for something, but in the heat of the last round of a comp people are more inclined to stand their ground in the hunt for glory. However hard you try, one person can always interpret something differently to another - its human nature.
The good news on FOG is that there have been relatively few clarries and FAQs needed - so far we have it pretty short cf any others I know. So anyone concerned of a mass of interps they won't be aware of need not lose too much sleep if playing FOG.
WHEELS AND INTERCEPTS
On the above specific issue, the wheel is limited to the first bullet point only. The principle was always that intercepts go directly forward and either block a charge or hit a flank or rear by doing so. We found one exception needed where a BG could ride in front of enemy, blocking a charge, but in doing so have their flank hanging out and this wasn't logical. We therefore allowed a wheel in this specific case only, so that they could intercept putting themselves so that they would be hit forntally by the chargers.
Put an intercepting BG at 90 degrees to a charge but positioned 1mm ahead of the front line of the chargers and you will see this in action. Without this rule the intercept runs right across the front of the chargers 1mm from them, with its flank exposed. With the rule it wheels slightly towards the charger so that its front corner will be hit.
That's it. Otherwise its dead ahead with interceptors.
Si