"This notion that he want play ST is irrelevant since the roster has been expanded to 55 on game day and practice squad players can be activated."
Not picking on the OP but let's get something straight with this new 55 man roster bit, because it is getting tossed around to much.
The roster is still 53. When teams make cuts at the end of training camp they have to be at 53, not 55. They do now get two more slots on the practice squad, for a total of 12 spots.
Back to the OP, to get Dez on the roster we will have to cut someone to get him on the roster so that is not a good thing. Also, there are rules for these 2 promotions per week from the practice squad:
1. The same player can't come back up in two consecutive weeks, or else on the second week they have to be elevated to the full roster (and someone has to come off-cut, IL, etc).
2. The PS player can only make two trips up to the full roster per year without being activated to the full roster.
So the notion that there is a 55 man roster is BS, it is still 53.
Here is a good article explaining all of it.
https://www.arrowheadpride.com/2020...g-the-nfls-new-roster-rules-beginning-in-2020