After starting out in Heroes, getting a fair number of high ranked (4/5*) characters such as Tharja, Robin, a plethora of swordsmen and Hawkeye, there came a point where I had to reinstall the app as everything had been deleted ?. Puzzled, I reinstalled the app to find that everything was gone, despite linking to my NNID (which I thought would circumvent this possibility). I logged a ticket in the support section of the app and decided to work out what had gone wrong.
First test - I gave the phone to my two-year old and the first thing he did was look for the Heroes app, launch it, and (attempt) delete my data ???.
Now obviously I lost all my 'hard work', and as hilarious as it is, I think it's way too easy to delete data 'accidentally' from within the app (3-4 taps?). From the splash screen, the Menu button is what stands out, not the 'Start' button. Then from Account Management, I feel that the 'Delete All Data' is what stands out the most as it's in red!
I updated my ticket with some post-mortem info but will log another soon as I really think this ought to be moved. I've kept the phone away from my son for now, but that shouldn't be the solution!
This story did end with a happily... After starting Heroes again, on my second 20 orbs I managed to get Cordelia 5* and more significantly, Takumi 5*. Despite these two, I did prefer my old teams which featured some cool (subjective I know) Awakening and Birthright characters.