Honestly, I don't get the big deal. If you hate ads the way I do, then pay for the ad free version. It's likely that the price will remain the same for the ad free version and the version with ads will cost less. It's what HBO Max did when they added the version with Ads.
Yea I would think they plan to add a lower tier, not inject ads into the current one. I don’t think I’m alone in saying I wouldn’t keep the subscription if my current tier became the ad tier.