I originally wrote the beginnings of a scherzando section that was going to appear at M, but I eventually scrapped it and put in what is there now. So it's definitely a thought I had, but I rejected it. I didn't think it fit. It broke the dramatic arc for me.
I don't know very much of the oeuvre of either Bruckner or Sibelius, though I've started trying to explore Bruckner more recently and I am at least consciously aware that at times his influence did start to make itself felt as I got into the middle and end of the symphony. However, a much nearer and dearer inspiration to me is Mahler, and Tchaikovsky was on my mind heavily when composing the dance-like sections, despite me not really being aware of any specific piece by him that has those characteristics. I wasn't aiming to emulate any particular person though, so I could very well have created a hybrid style.