Out of curiosity, why is now the wrong time?

I just feel now is the wrong time as its a week before the start of the regular season

If we got a defensive player that we wanted to make an immediate impact would they have enough time to learn rob ryans scheme or would they have to be brought along slowly.

I think if we were to do it coming up to the draft next year no.1 we got a years play from ingram, no.2 if we get a player in the trade he has a full offseason and training camp with our team and no.3 like you correctly pointed out - our offense is successful due to the depth and versatility at RB, if ingram gets traded now it only takes PT to get injured and we are dangerously thin on the RB side.

I think if we were to get a years play out of ingram and trade him next year it would be a safe plan, sometimes gambles pay off (ambush) and sometimes you get burned by them

The catch to the defense is that it morphs throughout the season and into the playoffs so even our veterans are learning slightly different things week in and week out, it changes based on who we play.

Who ever we get will not be off the street and while a lot of defensive coordinators claim a defensive scheme there are only a few distinctly different different defensive schemes so all a player has to learn is the calls.

That first statement is very true; but, it does help with team chemistry - knowing the tendencies of your teammates and curbing your game to make the unit better is a very important aspect of developing a unit...