Arrows:

Your arrows seem very good all thing considered you are incorperating perspective by having them go from small to big and using shading on folds.

Sasuages:

Your sasuages are suffering from two issues that are affecting each other. First and foremost you are using to many contour ellipses this is an issue that comes in tadem with lack of minor axis change. One thing to understand in regards to contours is that you don't need that many of them often you only really need 3-4. When using a contour use them only to show key changes in form.

Textures:

You seem be going about many of your textures the wrong way in many aspects. First is your use of detailYour problem is your are explitctly describing the forms when you shold be implicitly describing them. A good example of this is your ivy, mossy ground and, fallen leaves. This leads into your second issue pattern vs texture The problem with all your explicit detail is that it is not giving your sasuage any form. This can also come from detail where it is not needed like your larger crocodile scales and your timber logs the marks on the sides of the log are not implying any texture so it undermines your work making look flat. Third and final is your lake of compensation for the curvature of your sasuage.This also works in tandem with pattern vs texture becasue your are not properly accounting for how the surface of the sasuage changes your marks end breaking the illusion and looking flat. Lastly is breaking the shilouette this is most evident with your water waves, wood chips and flower when breaking the shilloutte it should be used to continue only at the edges it's not something you can just break willynilly. You can' have a form in the middle of your sasuage and then head stragiht of to the boundries without respecting the sasuages contours it breaks the illusion.

Form intersections:

Your form intersections primary issue is making it visible to the viewer. The issue is that thier so much visual clutter that it can be diificult to see where the intersections are. When doing form intersections prioritize making it clear and confident rather than making it accurate. Put more emphasis on where the surfaces of the forms intersect.