none of the Beethoven sonatas are easy.
Op 14 no 1 second mvt. that piece is only around 5th grade standard. however, that piece is hard in terms of musicality.
Let's see...I think that any of Beethoven Sonatas is easy... Each one has a certain point of technical difficulty that can discuss the performance. The one that is consider the easiest (No.20 in G major, Op.49 No.2) has the first movement reasonably fast and the second movement considerably more dynamic. It's considered the "easiest", but, for any pianist, there are a lot of passages with a big difficulty level - big or small. But, anyway, a difficulty.Of course, there are some movements of the sonatas that are relatively easier than other ones - just like the first and third movements of Moonlight. But "relatively easier" don't means that they are "easy". I think that "easy" is the piece you can play perfectly at first sight - with no errors. And "relatively easy" is the piece that, with very dedication, you can play well after passing by a lot of problems that could be big or small.The sonatas Op.49 are considered easy. But any person will - absolutely - take some time to play them without errors. After this, the sonatas would seem to be "easy". This is why they are considered like that.So, I think you want to know the sonatas without a level too difficult. Not easy sonatas.OK, let's see. The second movement of Sonata No.19, that you are practicing, is pretty complicated because it's the fastest of Op.49. But with a good train you'll play that. The second movement of No.20 is pretty easier.Sonata No.25, G major, Op.79, is another "easy" sonata. All the three movements are relatively simple, but the first and third are more complicated. The second is very easy.You can hear the sonaas at YouTube - see that, in the mostly part, the second movements of the sonatas are very simple.Just hear the sonatas - you'll find out what you are looking for.
Did you use google translate? Just wondering whether poor English speakers use Google translate or actually attempt to type in english. Anyway, Just because it's slow doesn't make it easy at all. In fact, slower movements are much more exposed than faster movements and so they require much more control. It might just be your lack of English, but simple is the wrong word for these movements. In fact, I would consider most 3rd movements much simpler than the 2nd movement and the complexity of the 1st depends from piece to piece.