I can't see a lot of problem with the current trust system. We might have a little portion of invalid feedback from DT (I'm not sure if it exists in realityI'm not sure such kind of feedback exists, I have edited this sentence since people may think I have talked about DT existence, lol.). Despite this little amount of invalid feedback, we the normal member are getting a vast number of valid feedback which is vety helpful for us. I would prefer to stay with the current system with a little edition if theymos/community agrees.

1. You must have to provide a reference link, of course it will be from marketplace.
2. The person whom you are going to provide feedback must have to reply on that thread, it ensures a deal was happened. Applies for DT only.
3. If you are not in DT, both the person have to create a reply on that thread so that a 3rd party can't provide an invalid feedback.

I got this system in another forum and found it quite nice where invalid feedback can't be given.

If someone is talking about moderating feedback-
1. Everyday hundreds of new post will be created in meta.
2. Theymos have to trust a few moderators (a few can't cover it though) which seems impossible. If you look at the current recovery system, you will realize why theymos will not give the power to someone for moderating the trust system.