You have to remember, the Phoenix Suns only drafted Dragic because they thought he was a superb defender. And as for Dudley, last season he played against the likes of Kobe (Pretty sure I've mentioned this previously), and he did a darn good job at it too! His offensive abilities may be a bit overrated but he put up a good 10-20 points per game with the Suns last season when they needed him to. Yes, I agree you can't always rely on him, and I did mention if Beasley does play to expectations, then we do have a good shot at the playoffs.
And I can just imagine how explosive the 2nd unit is going to be: Marshall, Brown, Wes Johnson, Kieff Morris and Frye.
Marshall can find all of them at their sweet spots as mentioned earlier and any fast breaks can be led by Brown and Morris, or Johnson even, known to also be very athletic.