Interesting pick. Don't know much about him. We got a good grade for taking him though: http://walterfootball.com/nfldraftgrades7.php
Honestly in the 7th anything is worth a shot , not sure DL was the most pressing need and if they felt he was BPA who am I to judge but I liked Ben Koyack. He'd probably have been a good #2 behind Amaro but my thoughts are maybe the FO are under the thought process that Snacks won't be around much longer.
Macc said in his presser that Simon projects to be a solid rotational player if not starter, which is tremendous value in the 7th round. He compares to Damon Harrison and to a lesser extent Dontari Poe. http://www.steelersdepot.com/2015/02/relative-unknown-deon-simon-drawing-comparisons-to-dontari-poe/