You can't name your squadrons
What I've done, in the past, is create (but leave un
manneddwarfed) a whole lot of units, and then if I can find (say) five in a row that look like they refer to ranged combat, I delete all the ones within the range across which these nice ones are spread that
don't look like that. Then I'd look for names that work for melee troops in the remainder. Rinse and repeat. (Or decide that the ranged ones can wait, because there are some nice names for hand-to-hand units.)
Regardless of that, if I get something like "The vicious knives", I might keep it around for a hypothetical sharp-mêlée squad even if I was about to make a hammer-squad, etc.
Other than that, no, there's no deliberate naming. But you can make things work for you regardless, if you've got patience and a little foresight.
As to containers, I'd rather like it if a "Finished Goods Bin" could be called a "Figurine Bin" if it
only has Figurines in it. (Something that my set-up might well generate.) Bags of seeds (that you can trade for) tend to be so specific.
Anyway, you've worked out the "k" version. When trading, you can also look inside them (from the trading screen), and also in the Z-Stocks screen. (Or just go to the item you're interested in and try to locate one in a bin, but it'd be nice to have a quick back-to-ZStocks button, rather than having to go back in. A bit like you can when you view a dwarf's 'z-screen' (i.e. relationships and thoughts and nickname) from the Units menu, but that you don't get when you do a jump to 'c'haracter, even though that also has the other useful screens (i.e. designation, inventory, proficiencies, wounds).)
The interface could be better, indeed, but it could be worse. Biggest problem at the moment is perhaps that there are often several ways to get some information, but none of them is a panacea for every problem and you may not know of another. This is one reason why Dwarf Therapist was such a good idea, and I was (at one point) going to get a Stockpile Therapist off the ground, but I seemed to have forgotten to do anything about that.
Yes, stonecrafts (and other stone things) are generally an easy make. In a future version (possibly very soon), if you spam them with rock rings you may find they're going to paying on small-change for them, in the future. But maybe, even then, you can resort to your glut of rock amulets, instead.