One of my favorite fall born steers I saw this year was a Carpe Diem x Alias. He was a red blaze face, and just really stout and complete. I would have bought him, but he was already sold when I found him, and the new buyers wouldn't price him. And we sold a CD x Tiger (Hereford) bull calf for really good money this spring, so I think you've got something to look forward to.
We've calved several Carpe Diems out of heifers, but they were mostly Herefords. A couple needed a little help, but they weren't bad. Used him on a pb Simmental cow and got an 84# calf, so I wouldn't worry too much. Just watch her close, like you always should with a heifer.