I dont mind the un-natural look, i like the look as it is, i just want to make sure there won't be to much territory fighting
I agree with this. If you like the look of your rockwork, then I would just try to make it a little bit higher; if possible.but the main idea of rockwork is to make caves and 'comfy spots' for all the fish, and you have accomplished that well.
This is my general, personal preference as well. Although I did go for the flower pots in my newest tank- and I really like the look! Still kept the two piles idea with one pile much larger than the other and some open space between the two. I do like the semetrical look of your tank, and I think complete it will look better. Do what you enjoy, it does have enough space for the fish. And hey- you'll get board and rearrange them!There is a good amount of caves, if that is what you want to know; but IMHO, the rockwork looks to me too symmetrical and then, a little bit unnatural. I would create 2 piles (one on each side), one bigger than the other. The bigger one should be larger and higher (more than half of the tank's height). In the middle of both piles, you can put a few dispersed rocks or very low caves for decorative purpose. Of course, this is just my opinion.