Revisiting the draft, and now combining it with the trade, it really comes down to this in the end.
The Rams easily could look at this as having traded this years first for Garrett, and next yrs #1 was used for Simpson, but instead of spending a year in college, they got Simpson a year earlier to intern in LA under Stafford and McVay.
In the end that seems to be advantageous since had Simpson gone back to school, he likley goes top 10 next year. Now he is in the building and learning the offense. Makes a lot of sense now doesn't it? Went all in this year using both "picks" on Garrett & McDuffie, and then still got your QB a year early so he is in the system and ready to hit the ground running next year if needed.