Just
how much Diablo have you been playing lately?
Only thing missing is an acoustic doubling those slow keyboard chords with lots of reverb and you'd pretty much be nailing the feel of the town themes (and that's not a bad thing). I guess at this point your main decision is if you want to go epic or stay more ambient. If you do stick with the mellow side maybe try some kind of sparse piano type lead, just 1 or 2 notes between the synth swells, I'd slow it down a little as well.