Miller being back would be huge for Garland and Joshua in particular. They've been getting 2nd line matchups at ES, and Miller's return pushing them down should result in the return of their ES dominance from last year.
The bottom 6 was very much in bend, don't break mode over the road trip, and putting them back into 4th line minutes & matchups would bode well for them.
Petey has also gotten used to playing first line matchups again, which should soften Miller's load a bit as well. Expecting to see something like this upon his return:
Debrusk-Petey-Sherwood
Suter-Miller-Boeser
Joshua-Blueger-Garland
Heinen-Raty-Hoglander
Tocchet does things in pairs, so really I'm expecting Debrusk/Petey, Miller/Boeser, Garland/Joshua to be the glue and a bunch of Xs moving up and down throughout the year based on performance. Wouldn't be surprised if Garland is put on the top line & split from Joshua as well as we wait for his game to recover post-cancer.