These are really interesting comments. It makes you realize how little this area of music is ever dealt with.
I don't think that composers today are worse than in the past. But what has happened in TV is the lowest common denominator is in complete control. In the TV days of Goldsmith and Herrmann and those other great composers, the business was not as efficient. So they would hire someone who did an artistically good score just for the hell of it. But today, the suits know that you don't need art for "product" and you can create "product" with exactly those bleeps and bloops almost automatically. So the total efficiency of the businessmen in charge is responsible for the drop in musical artistry, not the composers.