The majority of players are ready to accept massive changes to FFXIV, as voted in the official poll few months ago.
It’s clear that 100% of people won’t be happy with every changes, but that’s how democracy works.
They said they’re seriously considering multiple jobs per class (but only one per class at start), so there's a chance you won't be pigeon-holed for too long (and if you really are). Getting worried or afraid on assumptions is a bit pointless at the moment since we do not have detailed job information.