I'm not 100% sure which VLANs you're adding to which port-channel.
But I'm assuming the HX Mgmt/vMotion/Data/VM VLANs to the UCS FI uplink port-channel.
Adding a VLAN to the uplink port-channel is only needed for disjoint layer 2 configurations.
Do you have disjoint layer 2?
I'd probably wait until after the Hyperflex deployment is complete.