The log states:
FMemoryWriter does not support data larger than 2GB
Which I assume is the cause of the build error. This means that some asset in your game, possibly a BuildData asset, is larger than 2Gb which isn’t supported.
I don’t know why the changes you listed would have any impact on this unless it’s related to the streaming poolsize.
You might have some success with compressing your lightmaps or perhaps by splitting your level into multiple sublevels.
A quick google of the above error might help you locate a few more solutions.