I will post the rotation once I have more time to test it out.

As for FoW passives... nah.

From what I can gather, you basically want to meld SkS onto anything that'll take it. I still don't have my full set of Ronkan gear and have two pieces of left-side gear left to go before I start upgrading my other 4 jewelry pieces (I was a bad girl and decided to get the ones with SkS on them first instead of the proper weapon>chest/legs>arms/head/boots>waist>jewelry order... for science) so until I test them out at the new Stone, Sky, Sea dummies out in Eulmore, I can't say for sure if the SkS will make up appropriately for the damage output. The lowest GCD speed I have right now is 1.89 which is still too slow for me. It may very well be that they want to encourage melding to determine play style and rotation choice because there were those players who loved the double-TK opener and those players who felt it an abomination, and it may ultimately come down to melds. But until I can test at those Eulmore dummies, I can't say for sure if the speed increase appropriately makes up for the damage loss. It might.

One thing's for sure, though. I can confirm that they want to encourage double-MNKs in a party with stacked Brotherhoods. The damage boost from that is outrageous and ultra noticeable, and benefits the tanks, too. Even in 4-player dungeons with one tank, it's a night-and-day difference with the damage output versus a solo MNK. Co-MNKing is definitely a thing they want to encourage, and that I can safely say DOES feel good. Like, really good. Brotherhood windows and chakra usage feels so nice with two MNKs in a party.

Overall I think that dealing with traits and inventing new ones is too much and needs testing and rebalancing and that's just not worth it. In the immediate short term, two oGCDs that are inexpensive to implement without having to change too much of what's already there just feels like the simplest and most cost-effective way to go. So long as one of them gives GL stacks and the recast timers are balanced appropriately, I'm absolutely certain all other concerns would wash away when you can use that oGCD where you'd normally have Wind Tackle. Then it's all about just finding creative ways to use SSS and fill those windows, and you're pretty golden. Luckily SSS's recast does decrease with higher SkS, so that's what I'm currently testing for.