Just going down the line.
GL 4 being a trait and stance independent is fine and better than it's current implementation.
The Fist changes still doesn't solve the basic problem with the fist stances that have existed forever. There's still going to be one dominant stance that deals the most damage. Plus not being able to change stances mid fight takes away Monk's unique defensive option and it's ability to mitigate damage from lost stacks. Earth stance will now be more useless than ever because we won't even be able to switch into it for spot saves, we'll only ever want to use Fire or Wind based on which is optimal for damage.
The form changes don't solve many of the inherent problems that exist. Leaden Fist/current Dragon Kick keeps there being a single disproportionate positional, Raptor Form skills granting a Chakra is an improvement on pure RNG but you've kept Deep Meditation 1 which should be scrapped entirely.
Anatman as a utility Cooldown at 6 minutes is absurd especially when it's interruptible by needing to move.
Tornado Kick is an improvement I've suggested in the past so I don't mind it.
Six Sided Star's new effect means we'd be using it basically every 10-12 seconds, which really removes the impact that the skill should have.
Form Shift would be a fine thing to implement now, it would functionally just make Monk less spammy in downtime.
The Mantra effect, by tying party offensive buffs to Healing/Support utility ensures that the support utility will never be used. The Fists of Wind effect being a haste to other party members will annoy people who rely on rigid GCD strings for buff alignment such as Samurai and Dragoon. The Earth effect will be useless because Earth will no longer be used. This basically makes Mantra less useful as party support in exchange for an unnecessary extra input for our Burst window.
Brotherhood along with the previously mentioned problem, doesn't solve the issues with Composition dependency and the RNG ensuring that the skill basically is never satisfying to use. You'll still either whiff or inevitably experience periods of Chakra overflow due to the nature of the gauge.
Tl;dr: There's some decent ideas in there but broadly this causes more problems than it fixes.