Morale penalty for too many wars

I imagine this has been discussed before, but... I remember a time when in CoW the number of active wars a player had was an important part of the game. I don't remember the details, but the more active wars, the greater the morale hit.

I don't know whether the 'expansion' morale penalty replaced the old system. But I don't feel that it's enough.

I don't feel that players are worried enough or suffer enough consequences from excessive active wars. Right now, a declared enemy A.I. won't trade with you and eventually starts attacking back. It seems insufficient.

I think that a player should be more cautious (to avoid the morale hit) when deciding to attack another player or A.I.

These are just comments for discussion. I enjoy CoW regardless, I just want to see it continue to improve.