To me it's a no-brainer. Of course you should be able to edit these things. It's also an easy fix for EA, since it's quite a big task to make sure that every scoutable country has a big enough name-pool to choose from. Allowing us to edit the names for ourselves would really be an easy way for them to approach it.
To be honest, I would also enjoy even further customisation in regards to these generic youth players. Hairstyles, face etc., skin colour etc. Perhaps one wants to have the youth player resemble a real life youth player and could make him look like this person with a few changes. THAT could be fun IMO. It's a single player mode anyway, so why not allow these things?