So i own a flint 2 and im very happy with the product.
im running 4.6.4 firmware and its rock solid and im not having any issues whatsover.
before i had an asus router and there a firmware update always meant, that stuff broke or i had new problems. since that time im super hesitant to update firmware of routers. My business is also reliant on the VPN Feature. If this would break, by business would go out of business.
should i still update the firmware of the flint 2 or just stick with 4.6.4 which does not create any problems for me?