I thought more about how Blaine was doing his best to be a grown-up. He is in love with Kurt, and wants to be there for him. Things between Kurt and Blaine were kind of awkward, but they would have been in any case. Kurt still loves Blaine, too. I think it will still be a while before they get back together, if they get back together. Burt chose Blaine as the person he wanted to have there for Kurt.
I'm still also thinking about Jake and Puck having bonded so much. Jake said he told his mother he was going away with Ryder, so clearly Jake's mother has heard of Ryder. Jake is making real friends in New Directions. I'm not too worried about Jake, when he has his mother and brother and a friend there for him. Things might get worse for him, but he has support. Jake and Puck had a roadtrip together, got matching tattoos, and sang a duet. That's a lot of brotherly bonding.
(Added: The Glee Wiki has Jake's mother's name as Tanisha.)
There was a bit with Artie that reflected back to "The Spanish Teacher." He sang "Feliz Navidad" and had maracas. That's kind of how Will was shown to be racist. Artie wanted to be a white rapper, and uses AAVE often enough. Artie's first dialect is Standard American English, but he'll go from one dialect to the other, and that hasn't been shown to be problematic. I thought early in the season that Artie would learn a lesson about racism sooner or later. Puck's going to be the one who really needs to be actively anti-racist, but maybe Artie will learn, too.
Brittany said something about Tina wanting to be an actress being a pipe dream. It's not that Brittany hasn't been brutal with people before. She's not sweet and innocent. Presumably that was a comment on race. Brittany's been making her share of comments on race this season. I'll have to rewatch for Tina's reaction. The members of ND were ready to walk out once Brittany said something about Joe. People who do meta have been talking about how fed up with things Tina has been this season. As Asian Persuasion, she was even challenging people in public. (Added: "Pipe dream" is an opium reference. I'm not sure if that was supposed to mean anything. I've read some about the Opium Wars.)
Hunter called New Directions a "diversity club." Aside from Kitty, the members of ND are pretty much supporting each other, but it's being shown that they could make improvements in some ways.