You're not exactly understanding the bigger picture here (can't blame you, you'd have to sort through nine pages of garbage).
The novel is explicit in what's going on: Dooku is on the brink of unconsciousness due to a lack of Force reserves. Dooku summons energy into himself and therefore the weight is lifted. It's a rather direct line of thinking. That doesn't mean I'm saying Dooku can do this; I don't think he can. Rather, I'm saying, specifically, the ROTS novel says he can. The reason I bring it up is because Syndicate is beholden to what it states, not that I, personally, readily accept it. The fact other sources portray Force reserves and replenishment is irrelevant to what I'm specifically arguing, which I think you're missing. Syndicate has to use the ROTS novel because he stated he would be beholden to it as absolute authority and already used quotes from it. Within the context of the ROTS novel, the quote is explicit in conveying that no, Dooku is operating at 1% efficiency and then, in a flash, goes back to, say, 90%, maybe even 100%. That's not debatable. As you pointed out, this is inconsistent with how Force replenishment works for all other sources, but we're using specifically the ROTS novel here.
Anyway, those aren't his baseline physicals - those are his baseline physicals with the Force flowing through him. He's not some superhero - he's an eighty-year old. Without the Force, he has the physical abilities of an eighty-year old. Granted, at peak condition, but that doesn't compare to, say, even a forty year old. In regards to alleging he "clearly" didn't recover - he did (again, we're discussing the ROTS novel here). The text states as much and conveys nothing remotely contrary.