So cool that you immediately predicted the nail masters were the theme of the first 3 pantheons. Even got the Yoda-sly part right, with him bouncing off the walls!
Godmaster is really an amazing end-game addition. Gives Hollow Knight the epilogue it deserves. Like, The Radiance is an awesome fight at the end of the normal story, but I feel like without Godmaster, the game ends too quick: you fight the final boss and then get a brief cutscene outro and it's over. Godmaster gives you a chance to revisit the game and draw out the endgame for much longer.