Bonuses are not typical in real life except for draftees. I prefer to keep things as is, so I do NOT approve of this new rule.
Currently there is no rule on whether or not bonuses should be transferred when a player that has one is traded (prospects, and possibly re-structured contracts if that rule passes). This is not a new rule, but rather a necessary clarification one way or another to ensure consistency.
I approve the decision that bonuses should not be transferred in trades from this point forward, all previous transactions should remain as is.