Make it more minimalistic.
Right now it is just a regular string quartet. If you want it to be minimal, just have one pattern playing for about 8 bars and then add new ones, or change its line ever so slightly. Keep the patterns going for a long time.
That is all I have to say for now, as I am not really a Classical critique. Keep up the good work. Could you review back on my song? Criticism is appreciated.
There are only 4 patterns the entire piece. Minimalism is based upon repetition, and I repeat them, just not constantly. :)
You like Glass alot, don'tcha?