Hello JR welcome to ATP!
I made a few of those over the years and feel like they periodically need 'refreshing' new plants added and old ones taken out - I consider it a continuous 'work in process' - which reminds me I have one that has semps and sedum in it and is due for a make over, it has moss in it
Yours does look great! The porch thing is a good idea - your does look like it could use a bit more light for the plants to really reach their peak!