So what? Out of five editions, there are now THREE consecutive (and newest) editions where Bards go off Charisma, one where they go off Int, and one where they go off Wis? There was wiggle room many editions ago, but the noose is now burying itself in the neck's flesh.
Edit: Out of my own curiosity, I revisited the old edition requirements for the bard. Yes, the bard did not use Charisma spellcasting until 3e. But in 1e, a character aspiring to become a bard still required a Charisma 15+ in addition to the Wisdom 15+ (not to mention 15+ Dex, 15+ Str, 12+ Int, and 10+ Con). In 2e, the bard may have drawn from the wizard, but to become a bard, one still required a higher Charisma than Intelligence: 15+ Cha vs. 13+ Int. Regardless of the spellcasting stat, Charisma has been important for the bard. It's little surprise that 3e just shifted the bard over to a Charisma caster, especially in the gradual evolution away from MAD.