I finished up Iconoclasts yesterday.  I did enjoy my time with the game, so here are some final thoughts on Iconoclasts.

I think that the gameplay is solid.
There are so many bosses.  I think that is too many therefore making a large portion of the forgettable...
That being said, the final sequence of the game left a really good impression on me and makes up for some of my issues with the game.
My biggest gripe with Iconoclasts is how much time I spent reading text.  There is a decent story within the game, but I think that he could have done just fine with minimal dialogue.  The final boss reiterated a key plot point without any words...
The "tweak" system seemed completely useless to me.  Therefore I decided early on to not bother with trying to collect the materials to craft the tweaks.  This also led me to having a really low completion percentage.

In closing, I liked the game.  I would definitely recommend it to anybody who likes action platformers with a dose of exploration.