When it comes to layout of proposed elements you wish to add to the yard, you should be working in plan view, not in perspective view with photos. They're fine for general ideas and inspiration, but placement needs to be in a plan that is drawn to scale. Based on the photos, though, I suspect you are placing the fireplace much to far away to be useful. A parterre garden is fine if that is what one wants and is willing to maintain. It is a high maintenance feature, however, so no mystery as to why its rarely seen in typical yards. Is someone in your family sufficiently into gardening that they would be willing to maintain a parterre? If not, it would be far more advantageous for you to put your efforts into general landscaping. Another consideration would be the exact plants you hope to grow in a parterre and if you have enough light for them. I didn't see that you said where you're located so I don't think you can expect much in the way of plant recommendations. If you're where they grow, many people grow bromeliads below live oaks, especially the 'flaming torch.'

A water feature! Awesome! And I really like the raised beds on the side, very clean looking Thank you

I agree it seems like a bit too much stuff for the size of the space. It would be good to get rid of a lower priority item and have more space for higher priority items. The "dry pond" sounds possibly unnecessary and potentially, risky. Can we presume that downspouts are not presently draining to that area? Would some regrading be needed for it to happen? What happens when in a prolonged storm, the pond overflows? I did a little erasing. I find it easier to explore ideas and doodle out schemes when I have the cleanest, simplest, most uncluttered base plan. It's better to keep unnecessary details away until the basic ideas (arranging and organizing) start coming together. IMO, it is better to acknowledge, accept and work with the "givens." The trampoline, being round and large (a major component of the yard) might fit better if you try to work the circle and fit other components to it ... since the circle can't be changed. Fire pits are also often round and work just as well that way. Patios can be fine when round, or when they have rounded edges. Given all that, I'd explore a circular theme to see if things can seem better integrated and have a more interesting layout. Here's one stab at it ...

so you want a deck that allows space to the window wells. (I don't know what code is for that in your state, so you'd have to check). These show ideas for decks that still allow light and egress from the window. I would advise you to do a composite decking. real wood may be cheaper, but it will need constant protection from weather and UV rays, which means painting or staining every year or two. along w/these decks, an arbor or patio cover would also be nice. and you could combine the decking material w/a hardscape depending on if you're building right on the dirt, or you want the deck up off the ground. combo of both would be nice be prepared to spend a good sum. getting all of this built isn't cheap. what you need is a patio/landscape designer to come out to your house and draw up something for you. I don't know what the big deal is worrying about the virus. everyone will be outside and has plenty of room.