Like I said, Saints would end up with two very young tackles earning left tackle money and one of them would have to play right tackle. They have moved J.Brown to left tackle and can draft a very good right tackle in later rounds. You don't draft a right tackle in #2 overall.
How about drating D'Brick to be their LT and moving Brown back to RT? This also doesn't make sense, Brown is paid a lot to be a LT, he hasn't shown anything that he can't handle LT. I don't think Saint has given up Brown on LT.
I still see Saints draft Mario Williams in #2 or draft A.J. Hawk after trading down few spots. Of course, if they can't find any trade partner, they may draft A.J. Hawk in #2, which is a lttile too high for Hawk though.