There is something seriously wrong with the way Sony has decided to handle saves on the PS4. Going through my online data they now display actual file sizes rather than just the general 11MB, but every single save is 10.5MB+, every single one regardless of what information that save is for. Which means in total, assuming no save is bigger than 11MB, we will be able to upload about 90 save files.
Now I don't know about anyone else, but I had to delete a ton of saves that were rather useless because my online storage was full with no knowledge of this, meaning the last month or so of save games haven't been uploaded. Just looking in the Minecraft folder there is for some reason 2 save games per world, which means for the 4 worlds along with profile data I am taking up over 100MB for one game. Trails alone was taking over 200MB, and I barely played that came when it came out and never went back. What in the world are they sticking in these saves to make them so big?
It isn't the biggest issue now, but with so many games coming out in the next couple months and the crazy amount of releases for 2015, what space is left is going to disappear fast. I can't remember ever having this issue on the PS3.