I also finished the Limestone Caverns later yesterday, but I'm just now getting around to saying anything about it. Aside from that one thing I mentioned in the last message, it was a surprisingly easy level. Next up is Tenrai's fortress again, I'll tell you how that goes when I get around to playing it.
I ended up not playing last night, but I've played some today. I got past the Buddha temple level, and while it was mostly a big repeat, you do get a cutscene with Tatsumaru at the end, and Quinton Flynn sounded pretty decent there. Not really forced at all, from what I could tell. The next level is the Limestone Caverns again, and the way two particular ninjas are positioned is giving me a lot of trouble.
It really is a shame she doesn't have a lot of dialogue, though, because I do think she could do much better. I think the story as a whole in both versions are such a massive step-down from Tenchu it's not even funny. At this point I think it will be quite a while before I feel like finishing this game simply because I don't have much motivation to do so. I hate to sound so negative about the game at this point, but it's true...
Anyway, it's cool that you got some Grand Master scores, it's been so many days since I beat the last two levels that I don't even remember what my scores were. I'm also sorry to hear you got a cold, I hope you get over it quickly. I'd recommend drinking an F-ton of water, orange juice, and herbal teas like Echinacea. You could also try to find some Throat Coat and Breathe Easy tea, those two also help me feel better when I'm sick. Usually I recover really quickly from colds as long as I drink a lot of liquids like those.
I agree, they were totally lazy with Ayame's story. I wish they would have just delayed the release for this game and focused on creating more original maps/levels and cutscenes and an overall better story instead of making Fatal Shadows. I chose to let Rikimaru fight Onikage. It was just going to be the exact same thing as any other time you fight him anyway except with Ayame, so I didn't really see the point.
I'm assuming that they made Ayame's story to play out as if she was the main star of Tenchu 1 or something and that's why she "has a bone to pick" with Onikage... I don't know, but I definitely don't like her story in this game so far. I feel the same on liking Debi's Ayame more than Michelle's at this point. I like Michelle okay and I definitely find her a bit more organic and lively sounding than Daniel Kim, but it's still like she fails to give the character a soul, and Debi, despite being a bit forced, still made Ayame a lot more endearing, compelling and funny overall.
Just from checking the Wikipedia page, it does seem like the PC version is the lowest scoring version of the game, but not by much at all. The difference is very small, but if you want to hold out for the console version then that's fine too. Since you brought up Wrath of Heaven, how much did you play of that level we started? I finished it and got past the opening boss on the next level, but after I got past that I got killed by a random guard almost immediately and just said eff it and shut it off. I didn't have the patience to go through a whole other level (a recycled one at that) after getting through a pretty cheap boss fight.