Question is: How common was the pod?
If it was a rare loadout as indicated in the picture, it will likely end up heavily restricted, if used at all, in scenarios and FSO. And it's certainly not going to make the Dauntless see any more use in the Mains than it does already. The increased firepower certainly won't offset the loss of performance (the SBD is already fairly underpowered as it is, now you're adding extra weight and drag), and it you want a dive bomber with six Brownings off the carrier, you've already got the F4U-1D and F6F-5, both of which carry a much heavier ordinance load, combined with much better fighting ability once ordinance is dropped. I could see it getting heavy use in Early War (Mid War still gives you the F4U-1, which provides much the same punch as a 6-gun Dauntless but with much better performance) but that's about it.
It might be a nice option to have for whenever the SBD gets remodeled, but it should really be low on the priority list. And certainly a perked ordinance option for the rarity.