So what exactly would this fix? I don't know of many people who have multiple 50s and have the money to buy even one house, much less two.
If anything it wouldn't do much. Those with multiple 50 characters (not just classes on one character) that could afford such on two characters are probably dual (multi) boxing and this would not affect them since they have multiple accounts. Remember a dual boxer earns twice the money from kills and quests and dungeons (if they can manage them), over a normal single account.
