Configure Scheduled Event offset of X minutes (multiple executions per hour)

With the new design of Scheduled Event implementation, it is no longer possible to configure on which minutes of the hour a Scheduled Event will be executed, if it is executed multiple times an hour.

For hourly SE's this is possible:

But I want to be able to say that a Scheduled Event that runs every 30 minutes, should be executed at XX:15 and XX:45 instead of the default XX:00 and XX:30.
The only way around this currently, is to create Scheduled Events that run every minute, and check which minute of the hour it is, before I actually execute any logic. This seems unnecessary.

The same as is currently valid for configuring the hourly Scheduled Events, the offset should not be able to be longer than the interval.

For me this seems like a very small fix, that would make sure we don't have to create checks and don't get a lot of dummy executions of a Scheduled Event that does nothing more then check the time, and stop.