I don't really see anything wrong with taking a multileg flight to get from A to B. I'd think a very small minority of passengers would choose to take a multistop flight if there was a direct route available. Just check out Orbitz, etc. When searching, the user can choose a maximum number of stops.
I think most people will pay a premium for more direct flights, so if you want to take a circuitous route, then fine. If they sell you the ticket, it's fine.
The airlines can change fares by the second. They can decide to increase award redemption levels. I'd argue that it's more unethical for the airlines to allow you to earn miles under one set of rules but be able to change the rules before they can be redeemed. Mileage programs have become cash cows for the airlines. One might argue that mileage earned under one set of rules should be redeemed under those rules.
Just my opinion, of course, but between my family we have plenty of miles and can rarely use them for anything!
fuzz