“If the new Shul has more talking and you’re changing because the old Shul became a crowd of older mispallelim who you have little in common to socialize with, so you want to go to Shul with a younger crowd you can shmooze with, that would seem to be unjustifiable.”
Agree on not changing shuls to schmooze more or better quality scotch in the Kiddush club…However, if you have kids and the tzibur of the old shul is increasingly geriatric, than changing shuls to a younger crowd so that kids have friends going to the davening and have special programs for the kids on the yom tovim might be a legit reason to consider changing.