I was taking a break from KanColle for the month of September, but last night's American Football opener was boring, so I turned off the TV and...
6-3 CLEARED!
6-3 is a vicious "Sparkle or Die" map, somewhat like 3-5 south, but the non-elite Tsu-Class is replaced by Evil Harusame and you have to waste a fleet slot on a seaplane tender. (Recommended fleet is 1AV / 1CL / 4DD for the friendliest A-C-E-G-H-J path.) You technically get better rewards by bringing Akitsushima and her flying boat, but Akitsushima is bad at fighting and you should probably take Chitose (non-carrier version) or Mizuho (if you have her) instead. I tried Abukuma as the CL because of her preemptive torpedo, but she was somehow less effective than daytime double-attack setup Jintsu.
You can also bring more CLs to take advantage of the air superiority, but more than one CL gives you a chance of Node F where Ne-Class Elite will take your lunch money.
In all, it took 6 sorties to clear the map, with two A-ranks and two S-ranks on the boss. (The two S-ranks were when I used Jintsu instead of Abukuma.)
Fubuki was MVP for drawing all the fire from the two Ta-Class Flagships in day battle and surviving with 9 HP to take out Evil Harusame in night battle. After this and her outstanding job filling in for Maya in E-3 and E-6 (and killing the CV Princess) I would have ringed Fubuki on the spot if I hadn't promised to not ring anyone whose boobs are bigger than RJ's.
It seems like only four kinds of people go back to 6-3 after clearing it: Harusame seekers, Katori seekers, Unryu seekers, and masochists.
Being none of the above, I'm never going back.
Edit: B32 and B49 cleared. My first two encounters with Hoppo ended with no Hoppo kills, but two boss S-ranks.
I've had Quest B32 available for a while, where you have to S-rank 3-5 with two battleships and one light carrier AND no aviation battleships or fleet carriers. But I was too cowardly to take a fleet with a single light carrier through Wo Kai and Hoppo.
Of course, now that planes can rank up, B32 doesn't look so scary. But I still brought the house, sparkling my entire fleet and using my pride-and-joy Ryujo with four max rank Reppus and an expansion slot with a repair goddess. Fortunately, the repair goddess was not needed, and it took only one try to get the win.
B49 (the newly added quest where you have to S-rank 3-5 with a fleet carrier as your flagship) was unlocked by clearing B32, and was a piece of cake by comparison. Hoppo's planes got wiped out, leaving her standing there going "Give Reppu... actually, any plane will do..."
The 3-5 Wo Kai has normal, non-takoyaki planes. Oh, what a relief it is.