Clan War opponent selection

I have a suggestion to make with regards to clan war opponent selection.As per my understating ,currently the opponent selection is based on the defence level of the war bases.Using this loop hole, players are upgrading their town hall without upgrading the defence. This will inturn help them to have more powerful troops and spells which is an advantage for these players in wars as the opponent war bases would be mostly a lower level town hall.Also with this high level army, they can attack any top level base.This will help their clan to dominate in war.

As a clasher I have experienced this issue in many wars and noticed that many clans are following this strategy nowadays(see the attachment).This may lead the loyal clashers in losing the interest in clan wars.I don't think this is a fair approach.

My suggestion is to keep same Town hall as a opponent with the current approach of considering the defence.