It's definitely more relaxed, and for players who stick to the baseline difficulty, there's generally no issues in doing content. Going into more advanced content may be the only difference, and for the most part it seems simply be far fewer players participating in it. In any case, I end up seeing Ultimate weapons and titles every so often; there's nothing stopping people from completing the hardest content, it just may take longer to find enough high-skilled players to do it.

If anything, the data center's "reputation" is a benefit -- it drives away the vast majority the try-hard players.
While exceptions always exist, but you'll rarely run into players who take the game too seriously and just make everyone miserable in the process.

So yeah, players on Crystal are generally happier and more relaxed.
... though you do need to stomach a bit more weirdness fairly frequently.