Levay says it was purely a creative decision to go down the all-synth route for the 2nd and 3rd Seasons, yet how come Udi Harpaz was able to score the first five episodes of the 3rd Season with a full orchestra, combined with synthesizers?

Could Levay of done the same, if he wanted to, or was it down to budget? I can't imagine it being the latter, but I just wondered, since he used the orchestra for 'EAGLES' (was this his first episode upon his return to the production, even though the first to air bearting his name on the End Credits was 'KINGDOM COME'?).