While I don't think MNK is as non-viable as it was in 3.0, I completely agree with OP. The class abilities contradict each other and nothing in Stormblood builds on anything pre-Heavensward. It's just gutted to promote this overdependency on chakra and party-makeup. It's forced "synergy" at best, half-assed development at worst.
Tackle Mastery alone feels tacked on, and Deep Meditation feels reworked to ensure MNK can't always depend on it since the way many, including myself, asked for it to work, functions as it should in PVP (every coeurl form move or reapplication of GL3 builds 1 chakra).
