Mythic branch already got this treatment with the RoV love.
I could be wrong, it very well could be just me, and I know both assault and nyzul use the same tag system so its impossible to separate the two (well not really: turn in result from non-nyzul assault = shave 1430 minutes off tag recharge | non-nyzul assaults get quick recharge, nyzul gets double token), but if my options were 5 nyzul per 5 days (I could be wrong, but I believe you can get 4 and hold the 5th assault orders) at double token vs 1 nyzul per 10 min (so indefinite), most people would pick 1 nyzul per day with a max of 5 per 5 days at double token.
I dont know how many people can stomach doing hours of nyzul back to back to back to benefit from the 10 minute tag recharge.
Again, it could just be me.