You definitely need some more substrate and slope. The layout is too flat and there's a lot of empty space on the top. I would think that the substrate height at the back should be around 1/3rd of the tank height and 1/4 or 1/5 at the front to strike a balance.
The rocks are too small compared to size of the tank so the slope can compensate it and extend the rocks close to the center (vertically) of the tank (typical viewing angle).
#2 spacing the clusters a little further will tie in along the length of the tank and placing a couple of the smaller pieces between the clusters will maintain the flow of the hardscape.
Lastly, FG should be very low growing plants like UG or HC. Some grassy plants like blyxa, sagittaria, hairgrass etc. on the background (around the rocks) will blend the hardscape more evenly with the flora.
This is my first cut opinion looking at your setup. Hope it helps
Thanks for your opinion, I'll add some substrate later to form a slope since I'll re-use my mix substrates of JBL aquabasis, Sera floredepot, ADA normal and powder, I can't put them all together now 'cause too afraid that the lowest JBL and Sera will mixed up to the top layer and will cloud the water then. Hope you understand my english
. This is my rough scape and ask for opinion regarding the rocks shape and formation.
My FG will be HC for sure and the setup layout will be triangular type sloping from left to right using major stem plants.
My setup will be like this one
Ok, I've slope the back a bit but haven't put all of my substrate as I've explain at the above, so please folks, let's imagine a bit, OK?
Also I've moved closer to center as you said, malaybiswas. Now, what do you think? Thank you.