They did alright, could have been much better if the leaked finalist names are true.
That said, overall thoughts:
Boston: C+. I like everything about this except the lack of an obvious singular form. Color scheme's great, the logo's very well done, I like the double entendre between a shipping fleet and being fleet of foot (well, skate), this is really quite good except for that one nagging issue.
Montreal: B+. The only thing I can ding Montreal on is the lack of an obvious singular form. The logo is the best in the league, the name sounds cool, when put in proper French order (Montreal Victoire sounds weird to me, but "la Victoire de Montréal" is great), and the color scheme ties well with the Habs without being an exact copy.
Toronto: B-. This is, to mix a metaphor, a solid base hit up the middle. Blue and gold always looks great together, The name works, the logo works, nothing feels off here. It feels like a name that's been in use for a while, which is where you want to be when establishing a new identity.
New York: B+. This is rock solid work all around. The name's plural, which is a good start, it has a great double meaning, between mythological sirens and goal sirens, the color scheme drawing from the Statue of Liberty is a good (if apparently not intentional) throughline with other NYC women's pro sports teams, the logo itself is a little bland.
Minnesota: D+. Color scheme makes perfect sense, but the name is poor, and the logo's very "NHL '06 placeholder logo". Sure, at least Frost is primarily a noun, but what is a single member of this team called? It lacks the classiness of Victoire, and the double meaning potential of Fleet.
Calgary Ottawa: F--. Not primarily a noun, no obvious singular form, MASSIVE "Hey, I forgot my homework, let me copy off your paper" energy from the logo.
However...
Leaked Finalists:
If we move a couple small things around (it seems like poor Ottawa was doomed from the start), we could have had:
Boston Emeralds
Montreal Lumières
Toronto Sceptres (or Tempests, either works for me)
New York Sirens
Minnesota Monarchs
Ottawa Sentinels
That feels like a much more resilient set of team names, to me, since every last one has the "what do you call one player" issue sorted, and that always strikes me as something that makes a team feel minor league.