hi,
i think that on your fisrt image, the tree was too green, and now it is too blue.
Tirmit,
Yes, I keep changing Hdr’s and get strange tints with them.
your progressing in leaps an bounds 
this is so much better then the first attempt !!! but I’d agree with what someone else said you need to try other stuff too
this pic is a “perfect” piece of wild nature ~ but in RL there would be a discarded tyre or beer cans, graffiti on the wall/fence, some brown or damaged leafs, perfect is only available in cgi lol
hope you take that as I intended look forward to seeing more of your work