Strev. had a Q and a half to show his stuff, he was unable to sustain a drive, was not able to move them into scoring territory, locked onto his first read and threw several passes that jeopardized the health of the receiver. When he replaced Nichols the RB's D tightened the box and started to beat upon him and Harris every time they ran the ball. Harris ran for 9/50 under Nichols and 9/30 under Strev. which indicates mighty tough slogging.
You can blame LaPo and his game plan all you want but if they have to rely on Strev. as a replacement, scored points are going to be tough to come by unless he starts from inside the redzone.