I want to contribute to this discussion.
I don't have much info as to why they chose that route all of a sudden or if Hasbro pushed that idea little.
But in the original series or Beast Wars or other ones we have had Transformers with weapons built in to them as well as carrying guns, missile launchers ect.
So I think part of it was inconsistency from the designers.
Or it could be the genius tha is Michael Bay, we may never know
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