I'm sure everything has been vetted by CCP. Since most of the girls in this game are fairly by the numbers design wise. I doubt you'll ever see something like some of the designs other gachas have.
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it's on playstation, that character there would just be one walking lightbeam.
Think I'm in this for the long haul. Been considering getting the premium battle pass; have yet to be compelled into MTX.
the moon pass for 5 bucks is pretty good value, it's almost 10 times the amount you get buying it directly, if you can log in every day to claim it. word of advice, if you go with that save the crystals, there might be stuff coming you can only buy with that (and if not/it's something you don't want you can still convert them later).
battle pass depends how far you're in, that's the ingenious part about it. the more you play and unlock the more you're pushed towards buying it because you can immediately see what you'd be missing. otoh you can always make an informed decision if the stuff you unlocked so far is worth it (it should work retroactively, but you never know with some companies). important: the bigger pass doesn't give you +10 ranks, it makes you start at 10. after that it's pretty pointless unless you really want to spend 10 bucks on that profile background.
rolling on banners itself is pretty straight forward if you can read the details and have basic understanding of statistics. rolling on anything outside the special in the limited banner is usually not worth it because the pool is either too diluted (standard banner has chars + weapons, all with the same probability) or gets overshadowed by the boosted chars (like 50% chance for venti and higher chance for 4 stars in the limited).
most gatchas are pretty chill if you don't fall into the OMG I NEED IT NOW mindset and have a bit of self control. while companies do the whole limited shit for FOMO, in the long run most stuff will be easier to get when new stuff comes out. plus there's a constant stream of free stuff to keep you in the game to maybe make you open your wallet in the future (apparently there's a free fischl coming next week for example).