Do I understand it correctly, for the V3 Pro if you do not subscribe to Cam Plus you no longer receive the 12 second events, and with playback you no longer have the button for the option to skip 30 seconds at a time back or forward? If so wow that is a downgrade.
This is correct.
Without CamPlus your events will be a Thumbnail Snapshot image in the events tab subject to a 5 minute cooldown lockout between events.
EDIT NOTE: However, because it does have Person Detection Edge AI, you will get Person Detection Event Tagging without a CamPlus Subscription.
This is NOT correct. SD Playback does have continuous recording with 30s back and forward button navigation as well as timeline scrolling.