Nothing out of the ordinary here. You probably arrived at the airport a little bit earlier because ATC allowed your plane to go directly to the runway instead of taking a longer route (as confirmed by the radar data from FlightRadar24). It was probably a quiet moment at the airport and there was no need for your plane to fly to the back of a queue.
Since you were allowed to fly straight to the runway, there was less time to descend, so the descent was a bit steeper than what you're used to. If you're descending steeply, the engines are not needed to maintain speed, and they go really quiet. However, in all likelihood, the only reason they did a steep descent is because they wanted you to get to your destination quicker.
The announcements at Ryanair are automated and have nothing to do with what happened. If there's an actual emergency, it is in the crew's best interest to tell everybody. They prefer people to be prepared, even if that means some people may panic. So unless they tell you, there's no emergency. Perhaps they remembered they forgot a part of the safety briefing at takeoff. Or they had some passengers overly protective of their hand luggage (the type that refuses to store their luggage in an overhead compartment six feet away). Unless you asked the crew, we can only guess.