As if you didn't already know, Level 100 Talents for Monks are preeeeeeetty terrible, and this is why.
First off, before going into the individual talents, they're not even on the same par. One is a survivability increase and two are damage increases (with marginal survival benefits).
Vital Connections (Soul Dance)
Passive
You are able to shrug off even spells, such that 30% of your normal Stagger amount works against Magic Damage
This is one I actually like. No complaints. Solid, if situational, defensive boost. It could maybe be a bit higher, but being able to stagger more than 20% of magic damage miiiight break the game a bit.
Chi Explosion
Consumes up to 4 Chi to cause the target to explode with Chi energy, causing additional effects based on Chi consumed
1+ Chi: Deals 2500 Nature damage to an enemy
2+ Chi: You also gain Shuffle for 6 sec.
3+ Chi: Also purifies all of your staggered damage.
4+ Chi: The damage also hits all enemies within 8 yards of the target.
Basically, this bills as a replacement for Blackout Kick (Doing more damage and gaining the same Shuffle duration for the same cost). The problem is that part of the skill of playing a Brewmaster is banking chi properly, and this talent eliminates the ability to always have 1 chi leftover to purify a sudden stagger spike. Furthermore, the 4 chi is practically useless as Monks have more than enough AOE threat and damage. Using it at 4 chi is basically like using a Breath of Fire on top of a Blackout Kick-- basically pointless.
Suggestions: Reduce damage to be identical to a blackout kick, add an additional defensive perk (5% Avoidance increase to rival the return of Holy Shield for Paladins?)) and make it a flat 2 Chi, replace blackout kick, deals X% of initial damage in an area or generates 3 seconds of Shuffle per chi used (4 chi = 12 seconds) to compensate for the fact that two blackout kicks is always better than a Blackout Kick and a Breath of Fire.
Serene Mists (Chi Serenity)
Instant / 1.5 Min Cooldown
You enter a state of mental and physical serenity for 10 sec. While in this state, all Chi consumptions are instantly refilled.
The major problem with this is that shuffle is easy to maintain. There's never a reason you need 10 seconds worth of blackout kicks (60 seconds!) of shuffle at once. The second problem is that, the only time this is possibly necessary is at the beginning of the fight-- But it doesn't make abilities free. It makes them refund chi cost. Which means that you can't open with 6 seconds of Shuffle, you still have to Keg Smash -> Blackout Kick. At that point, why not use your actual rotation since the amount of Shuffle this generates is frankly asanine. The only situation I could think of where this might be useful is solo-tanking Malkorok's Blood Rage, since you'd be able to purify after every swing. Except that you can already do that if you have a responsible amount of Shuffle built up before Blood Rage starts (and bank 5 chi).
Suggestions: Remove. Replace with a defensive cooldown. Monks are lacking major cooldowns compared to other classes. An idea: "Your mental and physical focus is so great that you may channel Zen Meditation while being attacked, but reduces the damage reduction of Zen Meditation to 50%). Ta~daa, physical Shield Wall.