Recently my clan faces difficult enemies in clan war...a mismatch enemy..i'm a 100% maxed th 9 and my enemy is a maxed th 11 with maxed heroes and grand warden... yup we attacked them 97% but they clean us up 100%...it makes us very demotivated to play...
So my suggestion...
1. The 2 heroes should NOT be calculated in the matching...if a person rush, that is his problem.
2. The matching should be calculated base on the first 5 and on and on...not in total...for example
Total matching point for a 15 person total points is 300..
First 5...150 point match with enemy +-3 points.
Second 5 ....100 point match with enemy with +-3 points
Third 3 .... 50 points match with enemy with +-3 point..

Hope this method helps to give a fairer fight..