Some of your existing fan base, becoming more experienced, will immediately clamor to make scenarios more difficult. More gamers probably don't play as frequently (play and replay scenarios to determine what options works best, spend time investigating game mechanics, etc.), and may offer comment only on needed technical fixes. Those who haven't yet purchased the game obviously know nothing about the game at all and have no input.
So I guess my comment would be if you're upping the ante in almost all scenarios, you may as well add a blanket higher level of difficulty for the game as a whole (e.g., above Field Marshal) and leave the individual scenarios alone. Otherwise you may be catering to a vocal minority at the expense of the "n00bs." I am one, and I paid in the coin as the die-hard gamers...
