Nah its more that they don’t want to further canibalize there own customers. New customers will/are steered towards the subscription game. However old players may or may not have all content so if they want new dlc for their current game they are out of luck and will be funneled twords you guessed it the subscription model.
I bet they will probably launch a massive mail campaign for old and new players and update the game as well so they can insert a pop up with a message like "want more and better experience " or “want to continue the journey…” I fear they will alter the game a bit nothing major just slightly to steer you