Yes, most modern designs have slots at the very bottom front to keep airflow there and debris from accumulating.
I should have looked at the specific deflector, although hard to even find a close up picture.
So, maybe a bit of searching would yield a modern design. If you can't find one with the air slots at the bottom, don't get it, I agree without that it collects garbage.
ahh... did a bit of searching, the design shown of the "official" deflector looks like a bad design, I would not recommend it. Looks like they don't have snow or leaves in Korea ha ha!
The right design would have to come forwards a lot to have air slots underneath... maybe too big and costly.
Is the goal to try not to get pitting on the leading edge of the hood?
Greg