My opinion, for what it's worth.
Well, firstly, amazing, amazing effort. It's hard, burly, and there's a BIG move to get the Rockiatrocity flake, which I believe Shawna has to jump to (unless she's grown since she did Rockatrocity first time).
No doubt this will dent some egos. Good. I think this is a world class ascent.
Grade-wise: I have tried The Pilgrim a bit. I linked from the start to the start of Rockatrocity, and I believe this is an 18 move 7c+. Add a hard, strenuous 7c to that, and you must get 8a+. It's not like you do a steep 7c+ into a vertical 7c - it's all much the same: Steep, fingery, hard on the core. It's way harder than, say, Staminaband (the only other long-ish problem I've done in that grade range).
I'll certanly put my vote in for solid 8a+. Again, I must emphasize that I haven't done it, or even got that close. Make of that what you will...