The speaker volume, or lack of it, was present on my first gen iPad mini and is present on my 2nd gen. I'm hearing impaired, so to hear the darn thing at all, I've got Bluetooth speakers by my bed and at my computer, just for the mini. My iPhone's are much louder. My 1st gen Air is perfectly loud.
Still, however, the mini is my go to device.
Is it really that much weaker than the first gen you had? Mine seems about the same, or at least I didn't notice a difference.