I thought the best part of his "The next Microsoft" was choice of font for the logo- it has a softness that fits the name perfectly but stands out boldly. I always felt MS' sharp, italicized font was inappropriate. Besides, any move away from italics is a good move, imo.
I think that one thing that Microsoft shouldn't have touched was their wordmark. The symbol - sure, it was a PoS and needed to be replaced, but all these fragile sans-serifs in bleak "friendly" shades of gray really can't hold a candle to this -
Old font: http://static.squarespace.com/static/50271a61c4aab6c54f9af5e...
New font: http://static.squarespace.com/static/50271a61c4aab6c54f9af5e...