I agree with the above comment. Your lineup is about as solid as it can be with plenty of power potential.
I actually wouldn't be too worried about your pitching. No, you don't have a stud, but you do have a handful of reliable, good pitchers. What do you hope for out of a stud pitcher? 1 W, 10 Ks, <2.00 ERA, <1.20 WHIP in 7 innings seems like a really solid weekly contribution to me. Maybe hope for more if you catch him on a week where he has a Monday and weekend start? I think the rotation you have will make you competitive on a consistent basis in those categories without relying on a stud to get you there week in and week out. Plus, the WW is always good for breakout pitchers. Consider last year's Cashner, Colon, Nova, Salazar, the list goes on.
That being said, it never hurts to have one of those guys, and you have some really solid guys on your bench and in utility positions. If you're going to set your lineup everyday, you could keep those guys for off-days/rest days, and theoretically have a lineup full of solid batters almost every day. However, if you're confident in your starting bats to carry you (off days considered), it may not be a bad idea to deal a couple for a nice arm. Shop around your league and identify people that have needs you can satisfy. I'd be comfortable with dealing Rosario and/or Alvarez (great for HR, horrible for Avg) or maybe someone else. Doesn't seem like you need Prado and you may find someone who will pay for his utility. Overall, looks like you're in a good place. Keep an eye on the WW for pitchers.
Thanks for your thoughts on mine.