Personally, I was a bit wary about episode 10, because I knew that it will be an episode about Hiromu's older sister Rika, and inevitably it will be about her opposition to Hiromu's continuous involvement with the Go-busters. But it turns out to be a very enjoyable episode which touches upon many things that I love about this series, such as the dual threat of Metaroid & Megazord, the relevancy of mechs GT-02 & RH-03 when BC-01 Ace isn't around, and the display of powers (as well as the drawbacks of those powers) for the Go-busters.
The battle between Hiromu and the Metaroid (Gunroid?) played like an episode of Kabuto and definitely the highlight of ep 33, and it is great to see Hiromu finally killed one by himself. Hopefully Yoko will get one for herself soon, as well. But what's most significant is the fact that Enter won it again in the end, after using human hostages to obtain the Deltanium 39 for their plan to create a Megazord with CB-04's blueprint, and I just love a villain who can proved to be heroes' superior because that makes the battles carried even greater sense of urgency and threat, like Darth Vader in the Star Wars trilogy. It's good we don't have another Warz Gil in this series. Although I would like another villain to enter the fray (pun intended), at least Enter is a worthy adversary all to himself.
In the end, I'm glad they finally resolve the Rika/Hiromu plot, because I would like Rika to become more than an one-note character in this series. I hope the next time we see her, the writer will come up with a more interesting story for her to be in.