Does the entryway have enough space to incorporate a singe "step down"? If so, then creating a platform at the entrance would be the easiest way to do this. Everything else is going to be a very expensive nightmare (ie. removing door and rebuilding the door jam to sit lower; or adding 6" of concrete throughout the entire unit).

I think a coral in a glossy finish would look nice. I like storm doors for the extra protection the give, even with a porch. I would get the same color mixed for metal paint. The blue posts and railing is distracting. White would be so much better. I would paint the porch deck a classic light gray and the porch ceiling haint blue - a blue like the railing is now. Think of doing the upper portion in a hunter green, the siding and the all the trim in white. Here is a house all in hunter green. Here is a house that shows how stunning hunter green looks over white.

Why can’t people come in through the back door? If they can enter into an acceptable room, I would just install an appropriate entry door and work on the outdoor entry space. If you have a foyer at the old entry, maybe that room can be repurposed. Maybe a mud room or office? I am planning to replace both my front and back doors with full view glass doors which could go either way. You should be able to find door options that are appropriate for both front and back doors.

Those door knockers are wonderful! I see a dragonfly in my future. I agree that the smaller one would look great with a "typical" sized door. I'd love if you shared a photo when you have it up.