As a new player to HBD (I'm in my second season) I was fleeced in my first season. Granted it wasn't egregious but it still left me feeling stupid and fairly angry at the owner that fleeced me. And the only reason I realized I was fleeced was because multiple owners messaged me asking what I was doing. Somehow the trade still went through though. And now I know who I'll never trade with again.
I think something that would go a long way is better world policing on trades. I think for veteran owners to reach out to the new guy and start to build a rapport with him but also to understand his logic in the trade before he Accepts or Vetos the trade, might help a bit.
I also saw in another thread about a mentors, this could be a great way for a veteran in another world to take a quick look at the new owners team and give him some quick tips or pointers on what he thinks. I also know there was also a csherwood style thread being built. While I'm not sure a brand new owner would read it or understand it, it's a good way for relatively new owners to understand how roster building could work and things to take into consideration during various parts of the season. I know it helped me quite a bit.
These are just my thoughts from a current newbie. But for the record, even after that trade experience, I love this game and these forums are great to read and learn from. So I thank you all for that!