I approve. It's a step in the right direction.
However they still need to produce monster flavor text that's actually interesting and evocative. You can still produce monster fluff that's some combination of dry, boring, repetative or poorly researched* if it builds on prior sources (knowledge check sidebars and monsters with classes tagged on in MM4 I'm looking at you). I really don't want to see something lackluster that's then used as evidence that flavor just doesn't sell if the book flops, because that sort of thing tends to snowball to peoples' psyche and it can influence other games, etc.
*Voor and Corruptor of Fate "yugoloths" in MM4...