Derrick Johnson will play middle linebacker in a 3-4 NFL defense. Do the Texans need to upgrade Foreman @ MLB, the consensous is yeah they probably will take a look at this in the draft or via free agency.
Trading up high in the draft order would cost the Texans. For this reason alone I oppose the idea. There are plenty of fish in the sea, the Texans will have another excellent talent to bring in next year and I think its more positive to focus on the players realisticly available at this time as well as those who fit the Texans.