Always better to have one than not and this will make 5 years in a row the Rams haven't had a Top 32 or even a top 50 player added to their roster. It'll only be worth it if Stafford proves he's capable of leading a team to the Superbowl like Goff did even if he stunk. Stafford has never even been in the playoffs, should be interesting to see how it all works out for both teams.
My guess at some point both teams will have to find the QB of the future in the draft again. Assuming they don't take one this year to sit and wait behind Goff and try to emulate GB.