This certainly doesn't look good. They're bringing in Patinkin, who is certainly too old for the part, for three weeks, what would have been the last weeks for Oak's run. They still have no announced Pierre after Labor Day.
The possibilities:
1) Oak got a new project and asked out early. That's possible, but three weeks, after he prepared for the role for months?
2) Oak was fired. But if he's that awful, which I have not read from people who have seen him, why would the producers embarrass him like that when box office receipts have seemed decent and people are still filling the theater (albeit at lower prices)? And if he was fired, why wouldn't the producers bring in the understudy or bring back Dave Malloy?
3) Patinkin is certainly a big name with a Broadway pedigree, and I don't doubt that the show will do well in his three weeks. But it's only three weeks. It doesn't really solve the show's long-term, or even medium-term problems.
The whole thing reeks of desperation, which I'm sorry about, because I loved the show when I saw it in April and didn't feel like it needs a big name in order to survive. This isn't Hello, Dolly, where it seems that almost everyone is paying the big bucks to see a Bette Midler star vehicle. But I'm sure the show's costs are high. I read on Twitter that someone picked up tickets for later this week for $39. That's great for them, not so great for the Great Comet producers.