Just some suggestions, not sure if they exist.

Option to default the check box to on for online event and RSVP:

This is to help ensure members go this route for engagement and see the online event url box. Especially if mostly online events in the community.

Also better block to use in the suite like:

 

I'd agree 100% with a toggle option for RSVP. Its my number 1 reason why I have to monitor every event as most people accidentally miss that they need to switch it to 'on'.