Time to move on
Too many arguments and threads depicting Jane or Kenny's abnormal sense and crazy decisions. There's no real answer to which ending is better than one opinion won't be satisfied by the other. What's best is to determine what we think is going to happen in S3. They're both obvious determinant characters, so we assume another time-lapse? Or a rather two-part single plot story? Jane's ending leads to inevitable consequences no matter what choice you choose, and Kenny's ending whether you leave him (Trouble ensues in Wellington) or go with him (Christa v2.0) also leads to questionable dire situations.
As least populated as this ending is, would going alone be what could happen in a certain time-lapse following either sided ending after something bad takes place and you having to escape with AJ?