I would simply like for there to be MORE challenges per day and per week. I understand that it isn't desirable for us to burn through this, but it's the first time I've WANTED to do standard things like capture or assassination missions in a long time thanks to nightwaves. It gives me more to do and keeps me on my toes.
I think a good amount would be 2 dailies, 9 weeklies, 4 elite weeklies to make sure that players have options, that those who can't do elite can still get appropriately rewarded while working towards it, and allows veteran players to work through it a little faster to get more out of the system. That's an increase of about two ranks per week (61k standing as opposed to the current 43k) but that also means the minimum completion rate is about 50%, which I think is reasonable for people with busy lives due to work, university, etc. who benefit most from this new system.