I agree, there could be more trades. BTW, I got an offer too and didn't like it., so I ignored it. The other GM messaged me, quite upset, to say that next time I should at least reply to the offer, even if I don't like it. What does it mean?
Your relationship with other GMs as well as the team owner is important. If you always offer bad deals or ignore messages, other GMs are less likely to want to deal with you.
Personally, I don't mind having fewer trades. In previous years, it seems as though there were too many minor and unnecessary trades; trades for the sake of making trades.