Possibly the best episode yet!
This 6th episode appeared to be a crucial point in the Super Mario Bros Z storyline with so much happening on Yoshi's island. It is also a really good thing you managed to exceed the 16k frame limit in terms of the story and even as a better end product. For the story my guess is you were able to tell everything in as much detail as you normally would like with all the action inbetween. I suppose it would also give you more options with the fighting scenes; different angles, cooler moves. Other than these things this was the same as the previous 5 episodes which of course is all for the best.
I seriously cannot wait until the 7th episode and im sure it won't dissapoint.