The canopy still looks like kind of smushed onto the trunk. To fix this, try to think of the branches as the bones that hold up the leaves. Tree branches typically start thick and gradually taper to a point. What you have here is a very thick trunk and very short taper room. If you were to try to draw the branches underneath it would look odd:
I didn't draw that perfectly, but it looks a bit too cut-off. The trunk would either need to be thinner or the canopy larger so that it can accommodate the length of the branches.
The same trunk with a modified canopy:
I know that since you've worked on the texturing on the leaves, you probably don't want to alter the canopy that much, so you could always change the trunk and shift the canopy a little:
What I'm trying to get at is, try to think of the flow of the tree. The branches grew before the leaves, so the shape and number of the leaf clusters are dependent on the movement and placement of the branches.

I also have another suggestion, it's not super important because lots of trees are dense, but if you want to add more depth you can show some of the branches peeping through the leaf clusters (edit: I just realized another poster suggested this, oops) sort of like so:
That looks kind of weird but you get the point
I like the color and texture so far, you seem to be great at the details but need a little help with the bigger shape
Keep it up!