LEGO Powered Up app update with train controls & new servo block - does it really work?

The latest 3.3.0 update of the Powered Up app added a control interface for the 10277 Crocodile Locomotive, and also 2 new blocks that should "improve the servo steering". I took a closer look at them and you can find the details in the video. Here're the official release notes:

This update stays on track, with the addition of the new LEGO® Crocodile Locomotive (10277) controller.
• We’ve also fixed some squeaks and knocked some rust of the clutch, in the elevator, in the Haunted House (10273). Also, beware of the Pharaoh’s Curse!
• Two new coding blocks for improved servo steering! (Only works with Rally car and 4x4)
• Play lobby cards will now arrange after last one opened.
• A bunch of other fixes and improvements.

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