My system of assigning labour seems to be slightly unique. On immigration/adulthood, every dwarf in one of my forts is assigned to a military squad named something like "haulers" or "masons" or "craftsdwarves"... you get the idea. Every dwarf squad has the same labours (exception being craftsdwarves). I do this primarily because I want them all in leather to avoid discarded socks, and seeing as you always have several dwarves of a certain skillset doing the same set of jobs, I figured what the heck. It also lets me prioritise haulers in my human dwarven wave attacks against the FB that just slaughtered my champion Militia Commander.
Thing is, this would be near impossible very, very boring without Therapist. I'd have to go through a migrant wave, take note of which dwarf I want doing what based on their skills/my needs (while constantly checking back to the military screen to see what my needs are), and then I'd have to go through the squads on the military screen, manually scrolling past hundreds of names for each dwarf I assign, since, y'know, the game takes you back to the very top of the list each time.
What is the point of doing it the vanilla way over using therapist?
The way I see it, DT is a UI upgrade, plain and simple. It doesn't directly affect gameplay in any way, it doesn't turn your cats into goblin-murdering superbeings, it just makes the game smoother and more user-friendly.
Although, despite this small wall of text, I've been playing DF2014 anyway. But still, having Tharapist back would be nice.