Would changing the value of Scrabble tiles have a negative effect on the game?
The article says that the changing dictionary has changed the values of letters, and this seems like a very good point. For example, the existence of a single word, ZA, listed as entering the language in the mid-late 60s, makes the Z much easier to play. (I wish I had an old dictionary to figure out when the even-more-important QI entered English dictionaries!)

However, there already exists a "Scrabble-inspired" game with different tile values, of course: Words With Friends. (That game seems to have made their letter value choices based on different guidelines than the article; for instance, its G is still more valuable than an M.) Players who are good at Scrabble are still good at Words with Friends; I would not expect to see any differences in win percentages below the master level of play. Ultimately, your luck in your tiles' value is largely outweighed by your luck in drawing tiles that go well together; a good blend of consonants and vowels, for instance, and plenty of the powerful S (which would be the best tile to draw even if it were worth 0).