i think the fescue should do fine back there, plenty of shade.. a little sun at parts of the day. there was mostly fescue back there until late spring when i killed it all off, i had some other plans to go with a warm season turf type, but changed my mind.
I broke down and mowed today, just took a little off the top.. parts were a bit over 4 inches, i just don't want to wait and it gets real tall and i have a jungle to mow. it is looking good today. might not be a bad lawn after all. not to terribly bumpy to mow either (despite the deep till) i mean, i won't be cutting at the lower limits of the recommended cutting height for tall fescue. i'm glad to have some normal turf areas back there now, before it was a nightmare to deal with and i hated to mow it.