Lugo certainly is hot right now. If he can keep hitting at this level, he certainly qualifies as a breakout. I don't think he'll ever give you much power, but the rest of his stats ought to be solid for a thin position.
Carlos Guillen has certainly performed better than expected. He also won't be a star, but might be worth a look for those hurting at ss. Izturis has potential but may not show it for a while. And Rey Sanchez will be overlooked in many leagues.
As to the trade, I'm not sure that Dempster is the (main) issue. I just wouldn't be happy receiving Leiter as the main pitching return in a trade where I give A-Rod, and if you get Schilling, giving up Morris is too much. The deal would look a lot better if you can find a scenario where you receive Schilling and keep Morris. Good luck wheeling and dealing!