I actually think I know where the problem lies, and I'm gonna use myself as a bit of an example.
I'm just going to say it, Nubbin; I got my style from you and Lapse. Years before I ever put my first song together, you two were the only artists I regularly listened to, so a lot of my music follows the format of glitched samples, sweeping orchestral accompaniments and layered drumwork that you guys laid down years ago. But, as I've been spending the last year or so trying to diversify my own music and make an EP, it's become apparent that the style I started with simply won't work anymore. But enough about me.
You've been uploading to this site since 2008. Think about that for a minute. Your style has been mostly the same for 7 years, nevermind the three years you spent away putting a halt to your production. Sure, you've gotten better as an artist with each new song, but you've held on to the Orchestral/Jungle/IDM/Chiptunes style throughout with only major changes in the DAW you used and the types of synths you've had access to. As much of a fan I am of you, and you know I am, your stuff in 2014 sounds like what you were making in 2009, just with more clarity.
I don't think your problem is that your sound is amateurish at all. It's very apparent that you know a lot about music production and have a good ear for mixing when you commit yourself 100% to a project. But I do think your sound is starting to stagnate, and even you're aware of it now. The biggest barrier to your progression as an artist at this point will be your willingness to tear your walls down and let your music change with the times. I feel like you want to make another Wizard's Ascension, when what I think you need is something completely different, something not even you would have expected from yourself.
But I'm simply saying this from my limited perspective; as someone who's been tuned in to your body of work for almost seven years.