Not at all a dead topic, just slowed down. Aroenai and I regularly work on little pieces here and there. The major work has all been done, so lately it's been little bugs here and there as they're found.
I can't speak to the torso strap textures, that would be Aroenai.
You are correct that the sound in the cutscenes is off on PJ64. Here's the fun thing about OoT - the timing for the cutscenes is different for every cart/disc release. It's also different between PAL and NTSC, and different when either region is played on PJ64 and again different on NEMU. There might even be variances between some console versions. It's very frustrating. Last I checked, the NTSC patches are within the acceptable range on real hardware. I did have to tweak each of the 3 PAL releases (MQ, GC, Debug) to get the timing for the ending acceptable on hardware. It took a crazy number of hours to do that. They are still off on PJ64 and NEMU, and that's just how it has to be - sorry. Changing it would mess with hardware timing, and that's what we are most focused on.
You can rip the ending in video format from the GameCube discs. I think it's probably out on the web somewhere too. I know that isn't ideal, but if you don't have access to view it on hardware, that's the next best thing. Oh, and you can port your save file over to any of the other releases to view the ending.
As for the text speed for MM - Aroenai and I check in on this from time to time. No solutions yet, but it is something that we are looking into. Mostly while looking into the sound issue for MM NTSC-U 1.0 release.