Guild Wars difficulty fix forcing the use of other heroes

All things considered here is my take on this issue.  To make this harder and eliminate the constant use on SPY and SMY limit the use of heroes in guild wars.  You have 18 turns limits the use of all heroes to 9 times (or some other number).  Meaning you could only use Sasha in half of your 18 turns.  As guilds advance in level start to take this number down a notch,  Advance 1 guild level then this number becomes 8 and so on.  It will certainly make you think before just heading into each battle with SPY or SMY.