It looks pretty cozy to me, seems like you've done a great job trying to keep her warm outside while you're gone. If she isn't a blanket/bed destroyer is might be beneficial to throw 2 or 3 big fleece blankets in a corner for her to snuggle into if needed.
I don't know much about outfitting outdoor kennels.. what about something like a large heat lamp hanging from over head?
SG S-Hunter vom Geistwasser CA CGN TT (Airport Wildlife Control K9)
Zenna vom Geistwasser
"May my enemies live long so they can see me progress."