Except you can clearly see both Ridley and Samus in the moment he busts through the walkway (that feat alone should tell you how strong he is regardless of size). Ridley is closer to the camera in this instance, but you can still tell he's smaller than his usual appearances. Personally I feel that a smaller Ridley will give him a chance to demonstrate his intelligence when he can't always brute force his problems away with size & strength.
Also the ship he knocks around is called the Falcon Flyer, not the Blue Falcon which the captain races in.
Yes, but that shot is a clever use of perspective. It's close to Ridley and from a low angle, so he appears larger than his actual size for this game. It's similar to shots used in kaiju movies, like Godzilla, where they're able to make a man in a suit look like a 100 meter tall monster. Put any character in that position and they'd look huge relative to Samus's position in the shot. The same principle is used in his splash screen ("Hits the Big Time!") to make him look, well, big, despite not being all too large in the actual game.
I've watched a bunch of reaction videos to the Direct, and at that part in particular, I think at least two separate people were temporarily convinced, based on those early parts of the trailer, that Ridley was somehow gonna be way bigger, like possibly Pyrosphere sized. As though Sakurai had just said "Screw it" and just made the Ridley from Brawl or Smash Wii U a playable character. But then the gameplay starts, and they see he's resized to be smaller. It's almost like a bait and switch to mess with your expectations, given that the cinematic part of the trailer makes him appear larger reasonable for a character.
I agree with you that the smaller Ridley opens up some opportunities to display his intelligence, rather than just his raw size and power. Not sure how we'll see that play out in the game, given that there won't be a story mode. Speaking of which, Smash Wii U's intro screen was comprised of all the cinematic trailers for the game, but we only have one so far for Smash Ultimate, and the game is less than 5 months away. I wonder how we'll see Ridley appear in any future trailers?
Oh yeah, it is the Falcon Flyer. Got confused because the stage is called Big Blue. But that's the name of the racetrack, and not anything to do with the ship. I'm not an F-Zero expert, that's for sure.