This is a one game over exaggeration. Pitta gets more than enough targets (excited for a Gilmore return). Perriman missed an entire season, camp, and pre-season. It seems pretty obvious he is still adjusting while playing behind SSS and Wallace. Most days, SSS and Wallace get a normal workload. SSS gets 7-10 targets usually and Wallace avgs 7. Wallace is not someone you force feed the ball, he is not a someone who runs great routes, makes contested catches or someone who continually beats man to man coverage. A 5 catch day with large chunk gains is perfect.
So while Sunday was unusual (cincy also played a lot of man and 2 high safeties), their involvement in game planning has been normal