Not sure if it's because of the MKV video files but I still have the same issues with the compressed version.
Lets compare 0.0.8 animations/vids with remastered ones.* Some technical details are remaining the same, the most significant is probably that VP9 video codec is used in both cases. But vids themselves have gone through a big change. Width/height of the most vids back in 0.0.8 was 1920 x 1080 px. In the remastered version it's now 3840 x 2160 px. Videos frame rate has jumped from 30 000 to 60.000 FPS (2 x) and overall bit rate from 698 kb/s to 5 412 kb/s (
7.7 x!). Side note: they also moved from WebM format to Matroska (although .mkv file extension is used in both cases). I think that explains why older/less powerful devices may have lagging/unsyncing problems now.
Unfortunately I can't say anything about compressed version (didn't try it).
Was it worth it? There is no single answer to this question I guess. For me it's an overkill, like cracking your Christmas nuts with a sledgehammer. It's a porn game, not some Hollywood blockbuster you watch from the other side of the room on a ultra-large QD-OLED TV screen. Also: IoM renders are fine, but some "squareness" and lack of details are now more showy imho. But then again - I'm just a random non-paying dude from a pirate forum of porn games.
* I took V007_Jen_Fred_Kiss_Clothing_Store_01.mkv as an example, but it seems to be a pretty common sample.