Complicating matters somewhat is that, because of the prevalence of tzdb, in a sense we're "victims of our own success".  That is, whatever we end up picking will likely show up fairly automatically in a lot of public-facing places, and so even if it isn't what the public would've naturally used in the immediate aftermath of a change, many will be fairly quickly informed by what they start to see, and may start adopting and spreading whatever nomenclature we've picked.