You should have 3 gB now, right?
That is 50% more than you did have most likely. I have been on the Family Share Plan two years after converting from an Unlimited Plan on my personal phone. For me, it was simple $$ logic. Sometime during the past year, Verizon sent me an email stating I would have 3 gB now instead of the 2 gB I signed up for.
VZW pays attention to their customers, I've been with VZW now 20+ years and yes, they tend to follow the trends slower than T-Mobile or Sprint.... but they have been the single best coverage provider over the 20 years I have been with them. And they will typically give you a one time 'thank you' when you are talking to their Customer Service departments... I have had several $20 and $35 rebates applied to my account to waive off the upgrade fees. (you don't have a chance at that if you upgrade online only)