To me the delivery pegasus looks like a reinterpretation of G3 Moondancer. (The blue earth pony, not the unicorn.) Her colors are spot on and her symbol is very similar. In the credits she's just "fruit delivery pony" so she might not be Fifi, she might just work for her. (Strangely, Thunder is listed in the credits but Zoom isn't.)
Zipp's Flight School was my favorite of these, really well done and also illustrates how Zipp isn't just "Rainbow Dash 2.0". Yeah she loves to fly, but she's introverted and doesn't want a fan club, acclaim, etc. Being the future queen is probably enough pressure.
Oh, and I continue to like Queen Haven. I like that she's not evil, she genuinely loves her daughters, but she still misunderstands them and creates problems for them . . . Also she's just a lot of fun since she's so dramatic.
I don't know if this was purposeful, but Windy's fear of daisies reminded me of Flowy in Undertale.
I didn't really watch Pony Life (saw one episode) but I like the art in this soooo much better. Tbh I had pretty low expectations for Tell Your Tale but I ended up enjoying the first episodes quite a lot.