Answer
Yes — there is a confirmed plan to deprecate Execute Online SQL Event Actions in a future update, though no specific release/version has been committed to yet. This follows the same security-driven reasoning that's kept Aurena from ever getting an equivalent to EE's PL/SQL Block custom menu type: allowing arbitrary PL/SQL to be written and executed directly from client-facing configuration carries real security concerns, and Execute Online SQL is being gradually phased out of Aurena for the same reason. If you currently rely on Execute Online SQL Event Actions, it's worth planning an eventual migration path (typically toward proper custom events/actions backed by deployed database methods) rather than assuming this mechanism will remain available indefinitely.