It's not enough to have Parker the guy guy hurt his hamstring in week two last year like every other year besides 2019 and he had no explosion and was running a limited route tree on one leg all year long. Same thing happened just 2-3 games in this year even after a lot of load management in preseason and camp, and he's not been on the field at all for a few weeks.
Tua's only game with a healthy Parker was week one of this year which happened to be a win.
Waddle hasn't proven anything as a downfield receiver in the NFL yet. He's made one downfield catch, also in week one. He's been running the Jarvis Landry route tree this year only with more speed and less tackle breaking ability.