The Tristan chord! Ah music theory. I remember spending at least an entire class on just that chord; analyzing it and tracing its trajectory through the opera. Fascinating stuff! I didn't attempt to take any direct influence from Wagner on this, but I can see where you're coming from, definitely.
The static nature of the original piece is one of the things I like about it, to be honest. Perhaps it's my minimalist sensibilities. I'm a big fan of Arvo Part -- Cantus in Memory of Benjamin Britten, Fratres, etc. For the Cantus in particular, he makes a statement, walks away, and the listener is left to reflect/extrapolate on its meaning.