I will say this however, Forte would be better than any RB we currently have on the roster by a significant margin so if we are talking a mid round pick you have to consider it.
I agree with the first part of your post, But I'll have to respectfully disagree with your comment in bold. I can't see how a player that will be 30 by years end is significantly better than the talented backs we have already. And I definitely don't think giving Chicago a mid round pick for a one-year rental is good business sense. Hell, Dallas could of had Ajayi with a mid round pick this year. We'd be kicking our own butts if the Bears found a quality RB with next years mid round pick. There's no denying Forte has definitely declined quickly over the past two years, only averaging a pedestrian 3.8 yards per carry. If anything, we already have a back like that in McFadden...But I'll add that McFadden is three years younger, is most definitely faster, better suited for the zone blocking scheme, and has never played on a play-off contender (yes, believe it or not that does make a motivational difference). Call me a homer, but I really want to see Randle running behind this OL again, he looked great in the limited opportunities last year. Randle hasn't been giving a chance to carry the load yet, so to say that Forte is significantly better is strictly a matter of opinion bc we haven't seen Randle as the lead back. I'll admit that the name Forte is appealing simply because we know what he's done, but that doesn't mean that's who he is now. I understand the concern at runningback, but its unfair to over look the RB's we have. They are talented and if any of them ARE going to revive or become Stars in this league...then their best chance will be running behind the best OL in football.
side note: Forte is a prime example as to why Dallas wasn't willing to overpay Murray.. Forte has declined significantly since he turned 28.