DW does add a lot of nifty features, including ways to keep your BB rating under control by offering a selection of Casus Bellis (if one or more applies), giving different BB modifiers for various actions. You can also chose whether or not you want to call on allies when going to war, so you can (with enough prestige) seriously gang up on select opponents when declaring wars, not just when being attacked.
Of course, things sometimes comes back and bites you in the butt, because the AI does it too. As Byzantine Empire, I declared war on the lilliputanian state of Avignon, being only guaranteed by Portugal (defender of Catholic Faith). Portugal then declared war on me, summoning England and Spain to the conflict, Spain summoning France to the war, who again summoned all their sycophant vassal states. I was suddenly very alone in an all out war against all of Western Europe...
Time for a reload
Logitech makes the best gaming mouse, other than that stay away from them. You can't even download a driver without being forced into a survey. If you don't 'register' your hardware, they nag-screen you untill you do. I have never experienced that level of arrogance from any other hardware producre, ever.