Sure, but it's not actually easy to just change your pricing model. Most gamers do not want to pay subscriptions even though they would pay for DLC and battlepasses. Free-to-play needs microtransactions that people actually buy so they tend to be pay-to-win or convenience items (inventory/bank space) that punish free players.

Why would releasing your server executable as a standalone be difficult to impossible to comply with the law? Many games already do this