Beyond this, everything is propaganda. Slogans like, "Trading is evil, just becase" are naive and not very useful in discussing the situation.
Lets do it like in the real world (fiba rules):A Player can only change his team once a season.
Without assessing the reasons for any kind of action or the problems that require it, how can you you be sure what you're suggesting is the most effective solution? Or if it is effective _at all_? So yeah, this is still propaganda, in a way.
I I see that even on BuzzerBeater will be the battle between a best teams - just a battle between the best cash flow