Well depending on the type of stairs you could introduce fixed clear glass or even tinted privacy glass to invite light in depending on what is there. That useless platform could then be full of plants & really light up the entry with greenery & light, if not then maybe rebuild a mix of solid wall & little box windows inserted up the stairway?? Renos always seem to generate their own little whirlwinds adding conundrums along the way...good doggie is guarding the front door for you!

Have you considered having the security screen on the outside & door opens inside?

That glass panel outside if replaced with solid wall could have a bumped out window seat next to stairs & casement windows/fixed glass or something else above might make outside seem more useful...

Victorian Workers Cottage Addition · More Info

Yes that would be better with the solid door opening against inside wall, security door opens against left side wall & extending the deck will mean you can stand at the top & open door without getting knocked down the stairs. Good luck with it all!

I wonder if there used to be a sliding door there?