I haven't read the scenario in a long time, but when I posted the stuff I had intended for reserves to be the ONLY scenario specific special rule that WOULD function normally.
The reason I choose to get rid of all the other special rules is so that we could avoid playing a real "Cities of Death" scenario.
Whereas I remember liking the Grand Assault scenario a lot, and do remember it favoring the defender, I did not intend for it to be unwinable.
I don't remember seeing Deep Strike or Outflank on the list of scenario specific special rules. In the Grand Assault Scenario theres a small box with a few special rules listed (if I remember correctly). I remember the only non-wacky one to be reserves. If this is not correct, I'm sure I had a reason for getting rid of the others at the time... but don't currently remember what it was.
These things always seem to come up on my day off
. I'll take a look at the books when I get to the store.
edit: Riley's posts may have cleared this up. I'll double check and post to confirm on Saturday afternoon.