I'm torn. While I did like The Count and Cookie hosting the letter/numbers, I have to say I always felt that the Count counting at his organ was pretty dull and a missed concept. There's one where all the Count does in his intro is grunt for some reason. I swear they kept Jerry locked up in that room until he did all 20 of them, and that was the last one and by then everyone just wanted to go home. Not to mention that it took them almost 3 seasons to come up with new letter and number introductions.
Still, Murray wasn't the end of these. They ended a full season earlier, being introduced by other characters. While it wasn't as much fun, it was pretty much an old school thing they did. Much as I liked the idea of Cookie and Count being in every episode, I really wish they kept that going instead.