It the people behind Chicago Fire are looking, overall, to get two steady paramedics back on ambo that the firehouse (and the audience) can count on, putting Dawson back there would certainly help.
Even when the characters weren’t on the outs, the duo provided lots of good emotional stuff for the show, and they were generally an unstoppable twosome.
As he mentions, some of that is certainly due to the nature of her strong friendship with her ambo partner in the first two seasons of the show, Leslie Shay.