I'm coming From CodeIgniter to Laravel.
So, is a bad idea using automatic routes to all of controllers?
Route::controller(Controller::detect());
Should I use this instead creating routes in routes.php?
Yes this is bad.
Controller::detect() is actually not present in Laravel 4 because it is a bit broken.
detect() will go through your filesystem and return controller files, but this is a bad idea because the order you define your routes matters. If you have any nested controllers you will find this breaking very easily.
detect() will also return files in a different order depending on the file system, so this leads to a lot of unpredictability.
I would argue that you should define all your routes any ways, it is a lot easier to read and debug.