If I were a GM or scout I'd put much more weight into the Senior Bowl than combine too. The real competition (in drills and the game), lack of script, ability to see how players react to NFL coaching and under pressure as in live situations while also interviewing them formally and informally. Always exceptions to that, of course, like everything. Example being Isaiah Pead, who was excellent in the 2012 Senior Bowl week/game...
I've always felt the main value of the combine are the medical evals and interviews. The on field stuff is a way to weed out some under performers or break virtual 'ties' in evals otherwise. Elevating a player because they did 3-4 more bench reps or had a 3 inch longer broad jump doesn't make sense to me.