Tagging and searching for songs based on skills that are practiced
If you are practising in a structured way you will want to focus on specific skills like bends, legato, speed, scales and so on.. Tagging songs (inlcluding Premium+ song) with what skills they require AND making them searchable on these tags would be a great benefit.
In this way I could find only songs for practising hammer ons/pull offs and combine that with the appropriate level of difficulty for my level of playing. This ccould possibly enhance the value of Yousician as a practice tool greatly.
As there are collections for music types (rock, blues, jazz...), there should be added collections for practicing specific skills, like these ones. This would help users who want to practice some skills to find songs for practicing those skills easier.
Johan Klinge commented
This idea could be expanded with adding other metadata to songs to improve on the search experience. Genre for example would be one of the obviuos.