5.53GB for a v0.2? Uncompressed images or very big content? Also the 60fps is lighter than the 30fps (5.65GB)?
A bit of both. There are 2365 1080p WebP images in the EP2 update - that's a substantial number.
Unfortunately, something must've gone wrong with the conversion from PNG to WebP, and every static shot is ~1 MB.
I did some tests on the source material (courtesy of MisterMaya <3), and even on 100q WebP, the largest image was less than 500 KB, with most hovering around 300-350 KB. So, if all goes well, the final size of the EP2 update will be reduced by 50-60% without a hit to quality.