What it means is immediately apparent. Characters who have a strong throw game have been given an indirect buff, just like grapplers were given with the removal of all-around invincible DPs. Removal of the throw OS also is an indirect buff to grapplers. The guessing game will be a lot more intense for an opponent when you're in their face. They can't just do the OS to evade everything; they'll have to either eat a throw or try to tech the throw and potentially get counter hit. No third option of "evade the situation altogether" anymore.