It's not only the tempered that need care, a fair few of our own were wounded on the Magna Glacies. If only we hadn't needed to defend the supply caravan, a lot more of us could've joined the front line.
There are all sorts of theories flying about as to why Quintus would commit suicide. It's thrown the remnants of his legion into turmoil, to make no mention of the refugees formerly in his care.
Many of the Garlean refugees are refusing to be treated with magic. While I can sympathize with that to a degree, there is a limit to what we can do with basic medicines and bandages. At this rate, there'll be none left.