I began vaping (and loving) Vita Bella from the day it arrived in my mailbox in Dec 2011. Have to admit that I never noticed it changing over time. It may have---I just didn't notice it.
Juices (even superlative ones) seem to have a half-life with me of about six months, which means that after a year or so, they tend to go back into the stash. I vaped a lot of Vita Bella in 2012, especially the first half of that year. Not so much these days.
For those who still vape NLV Bounty Hunter, you might try a 2:1 mix with Vita Bella. The end result is remarkably similar to the fabled (and discontinued) VapeTV version of Bounty Hunter. I know because I still have half a bottle of VapeTV BH. BH/VB isn't a perfect match, but it's darned close. The NET of VB substantially improves BH (which is a TINO). Uh, let me decode that for people new to the thread: The natural tobacco of Vita Bella substantially improves Bounty Hunter---which is a "tobacco in name only" juice---by adding a lovely tobacco bite to the cakey/cookie dessert flavor of Bounty Hunter.