Yes, I lived in a BCT for 3 years. There are issues, but I think that most of them come from the deployment/optempo, not the organization.
How much influence does the BN staff have on individual training? Not much, its the responsibility of the PLT and CO chain of command.
How much MOS specificity do you need for, for instance, MI platoon training? Again, IMO, not much- it is integrated into manuever training, not a stand alone event.
Yes, there are some difficulties, but they are not insurmountable.
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