Yes, another one of my favorite episodes, ever. Not just in this season. We have a lot more that comes together; we find out that the real Professor Avalon was held in Darkar's prison in Shadow Haunt. And (if we haven't realized it yet), the fake Avalon was behind a lot of ordeals that involved the Codex and Dark Bloom.
Flora gets her subplot, and helps the Pixies recover and heals the Flower of Life. Who also knew Pixies and Pixie Pets come from the Flower? It's the miracle of life. Hence the name.
Flora also admits her feelings to Helia (FINALLY, GIRL), and earns her Charmix. The writers clearly set this up for Flora especially. At least she gets some loving screen time.
Now, the imposter Avalon traps Bloom and takes her to Darkar, where they'll finally meet and activate the Codex.