To me, the main problem is not with the RoF slowdown, but actually it's Brotherhood. The slowdown is there, because you are getting extra TFC at RANDOM. Example: you just used bootshine, steel peak,... oh, TFC is ready! but I'm 0.5s into next GCD, what should I do? use TFC and postpone my GCD (dps loss) or postpone TFC (potential loss on chakra procs)? With the option to double weave oGCDs it is not a problem. Problem is the word RANDOM.
Just today I had ZERO (!!!) TFCs from BH during one of our pulls on o4s during opener. If that happens - and it happens a lot - the slowdown feels terrible. If you are lucky, you'll get 2-3 TFCs. In the second scenario, you won't fell the slowdown because you have a lot of oGCDs to use and the overall flow feels actually faster. In the first scenario tho, RoF feels like sh*t.
Brotherhood is not within your control, which makes playing monk very frustrating (for me). You join a dog farm with 3 casters? Well, forget about extra TFC. You wanna run expert roulette with monk? Why don't you rather level up samurai? And even if you raid in a standard comp with 1 ranged physical, 1 other melee and 2 tanks, you can still end up with nothing, because the job's performance changed from pure player-skill-dependent to RNGxRNG+RNG (and a little bit of player skill). 30% change to proc? If it ain't 100% might as well be 10% and you wouldn't see the difference.
I do not want the slowdown from RoF to be removed (but I'm not against it, if BH would be changed). I want rotation I can count on. A rotation that works in 4man or heavy caster 8man, too. One RNG mechanic is OK, 2 is meh but a RNG mechanic that is party comp dependent with another RNG inside RNG is a bit too much...
I won't go into Tackle Mastery or OIL territory. They are useless. Period. Heavy rework or removal. End of discussion.
(Earth tackle is especially my favourite. You use RoE to keep your GL during downtime and you are stuck with a GAP CLOSING skill that has SHORTENED reach, which means you have to immediately switch to FoF, making Earth's Reply status even bigger joke it is. While I can see the idea behind RoF, this one I have no clue...)
Tornado Kick and RoE work agains each other. Again - rework or removal of one of those (and I do not mean changing recast time or potency buffs/nerfs). End of discussion.
I won't be giving ideas on how to change monk, because SE probably ignores negative feedback on monk threads anyway. I listed what is wrong because after 3 years of raiding as monk I'm not having fun anymore and I want to have fun again in 4.2.