Well, disabling the Reunion just makes them being normal, if you do not inject and models into the core game files, obviously. When you inject Kaldarashas lgp package, both field and battle Cloud models look the same, that means consistent, but if you enable model overhaul after that, the battle model starts to look different in all cases with model overhaul enabled. It's just that they're differently drawn.
I mean, it's up you whether it is an issue at all, to me it just looks strange that in field Cloud is pale with darker blue fatigues, and then in battles he suddenly gets a tan and his clothes become brighter. A matter of taste, i guess, and a few will notice it too, so i dunno.
What i did is extract Kaldarashas LGP model package downloaded from Nexus page, and just overwrite the battle models, and that did it for me.
And about that, i have a question... Are the Models present in Reunion, located in Model_Overhaul folder are newer and have some important fixes that the ones from Kaldarashas package? All models from Kaldarasha are dated January 2019, but while most in Model_Overhaul are dated January too, some of them are from October 2019. Were there any important changes, or i can just straight up overwrite everything from Kaldarashas package?