A bird in hand is better than 2 in the woods. Certainly, getting the OC job at The U presently with full control of the offense is better than a future promise for the same position from Clemson that may never materialize.
If we want him, we get him simple. Coming to The U is a promo for him because he will be the one and only OC and calls all plays. Plus full autonomy to run the offense. Clemson can't match these.