Miss Piggy.
Nice looking goodies. Looks tasty.
I cannot speak to the sous vide stuff as I have never used one. but am intrigued with them. But as for the smoker ones, when I make sausage, I run the IT 155 but try to avoid letting the smoker temp getting any higher than 180* as that is approx. the temp the pork fat will begin rendering. This may be the reason for the pockets, or as mentioned, maybe just not packed tight enough. Regardless, looks are only part of the deal. Taste is the true test of success.
hope this helps,
Mark