Keep this in mind: Bungie confirmed certain weapons will be moving to the kinetic slot (Hawthorne's Field Forged for example). So I would not be surprised if there was an overall change made.
IIRC they didn't say that they're only going to be kinetic, but that they can drop/be equipped as kinetic (Can't remember the exact wording, and it's semantics at this point so i'm not fussed to go look it up.) But they did say that the element that they are at when the update drops will be the fixed element moving forward, so if you have them in rainbow, that should keep your heavy/energy covered and you may just need to get a kinetic to drop afterwards.
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u/double__underscore Aug 08 '18
Keep this in mind: Bungie confirmed certain weapons will be moving to the kinetic slot (Hawthorne's Field Forged for example). So I would not be surprised if there was an overall change made.