The "midi sound" is one of the things that should be left in the 90s. Live is always more beautiful than samples. What makes it sound bad is not positioning the microphones properly. Too far away and it gets washed out. The microphones need to close to the instruments so we get that cartoony Banjo sound we all know and love.
As long as it retains the same style and feeling of the old tunes, I'm all for an orchestral soundtrack. Based on the two samples we've gotten so far (which were orchestral, btw, sampled, but still) it sounds amazing!