I really like the final arrangement, and keep in mind that the moss will fill out. (My Christmas moss grew so much faster than I expected!) LOL! Didn't notice the stick until you pointed it out! But if you notice it and it bugs you, change it or it WILL become an eyesore to you. I attached my anubias to a piece of mopani that had holes and grooves I could feed the roots thru, and now it's securely attached itself to the wood. (Even has roots into the sand now.) Do you know what kind yours is? It would look good in the left corner between the rocks, or in the wood, or maybe on the far right on the bare arch of wood. Or where the wisteria is, if you're going to move the wisteria to the back!
I have 3 pieces of mopani, so suspect they drop my pH. I read somewhere that mopani will do that, and it's better for the fish. I keep forgetting to check for the GH/KH test kits. It's been so busy at work, and we've been short staffed lately. I am really trying to get into the weekly maintenance routine, but every 2 weeks is more the reality. I have black aquarium sand substrate, and vacuum the debris every water change. Actually that's how I siphon out water - vacuuming the substrate and moss. I just did a massive water change 50%+, and ended up rearranging my tank because I accidentally moved a piece of mopani and couldn't get it back exactly where it was. LOL! That kicked up more debris, so I refilled the tank and then siphoned out another 3-4 gallons. Waited 24 hours and retested my water. Ammonia was around .25 (I did replace the filter pad because it was nothing but sludge), nitrite was zero, pH had gone up to 7.6 (or higher), but nitrate was still waaaay high at 40+ (the vial was blood red). I consistently get the same high nitrate readings, so am wondering if my reagents might be the culprit, but I've shaken the living s**t out of the bottles. But my fish are acting normal, are active and eating heartily, and seem happy. The water is crystal clear too.
Anyway, your tank is looking great! Can't wait to see how the plants grow and fill out. It's going to be fun watching it come alive once you add critters!