Well, there's nothing to say that the crotchets should not be legato. Using the thumb twice makes an accent on the last beat highly likely. Hand size should not be an issue- considering that it involves spacing out the fingers at a distance of no greater than one letter per finger. So I couldn't personally see any obvious justification for fragmenting it with your fingering.
Ok, so you're suggesting to just play it like this: 1 - 4 | 2 - 5 | 1 - 4, right ?
Why I asked about this is because my right hand, when I played this bar for the first time, just went like this 1 - 4| 1 - 4 | 1 -4, automatically.
But it's still unclear to me when I shouldn't follow the fingering and when I should. Because like with the above example, you see that my right hand apparently wanted to do something strange by itself without looking at the prescribed fingering.
I then first had to look at the fingering and ''tell'' my hand to not go with its usual way but instead to do it as written on the sheet.