Lets pretend you have everything to 60...

[Istaru]

For most people who care enough to get everything to 60, I would say no.

They generally care about other things in the game as well... gearing said classes, crafting & gathering ( making sure you're all caught up ), farming glamouring.. so on and so forth

I spent all of 3.0 leveling everything. Currently I am in the process of now gearing those jobs, catching up on content that I skipped, making the relics that I did not finish prior to 3.0, getting glamour stuff, helping FC people get stuff done, crafting/gathering to recover what I spent to level crafting/gathering by buying stuff and turning it in for XP on those jobs. I have a long list of things I still want/need to do.