I think it has too many fine branches throwing off the scale and depth of everything. This weekbd I will probably trim a lot of the smaller branches and thin it out too "match" the other piece.
I think if you get a nice big java Fern growing inbetween those branches you might re consider that move. Or perhaps a few of the Needle leaf versions.
Also for the ballance of the tank, remove that wood on the left and stand back. Will change the look dramatically.
But that's me.