Serhiy, maybe I had not understood your proposal properly.

If you are asking about deprecating get_event_loop() call from outside of async code but implicit call get_running_loop() without a warning if called from async function -- it sounds like a brilliant idea.

Something like:

def get_event_loop():
    current_loop = _get_running_loop()
    if current_loop is not None:
        return current_loop
    warnings.warn("...", DeprecationWarning)  
    return get_event_loop_policy().get_event_loop()