It depends.
If we're 3 biotics on glacier for example, a jugg as 4th is no help, nor use, really. I tend to expect the 4th to change if there's an obvious theme/synergy already in the lobby.
If we have a mixed team, sure. We can play around that. Not every game has to be a murder train. We don't treat randoms as decoys. These days I'll play with anyone who puts on equipment and doesn't use a class opposed to the synergy in the lobby already.
We played a Gold game the other day (One friend and two low inventory, low level randoms, one of whom was a jugg) and got Rio and s/he was very good at their role. Got that really long Escort twice and s/he held a perfect choke point while we left them to die and did the escort, making life quick and easy on the objectives. S/he used medigel then, and other wise we played around them. Went very smoothly.
Basically, If there's a jugg in the team, the team strategy should change somewhat, Juggs actually make great commanders if they know the spawns and understand how to use their powers tactically.
I will admit to liking seeing an adrenaline mod there tho. When the escort drone is faster than you, you need to diet.
Have fun