I found a new skip in the game ! 2nd key door skip without rabbit. This is even better because it's faster and it can be done as LUIGI !
So, basically DDD will be done in 1 trip and as Yoshi, and we will be able to do Through The Jet Stream by using a glitch which requires the sub, threrefore impossible with the previous route. Beating Bowser will still be required in 150 stars, though.
Plus, JRB can be done without Wario, as the BCCless strat is a lot faster than going to search the Wario cap into the cave.
So the route canges are : after BBH 1st trip : Switch to Luigi, PSS 1, BOB cage star, JRB, clip and then WDW and nothing changes before later.
When supposedly doing the DDD 2nd trip, we will do all the course, and BitFS as Yoshi (yeah, we will have to wait for Bowser to spawn a cap, unfortunately).
With all those changes, with what saves time and what loses times (mainly BitFS as Yoshi), this saves around 10 or 15 seconds in a full 150 star TAS.
Video :
Link to video