The class skills gained by a bloodline are usually specific - a particular skill or a particular type of Knowledge. With the Arcane default, it's Knowledge(any one), so you have the flexibility to pick. But it's still a particular Knowledge.
Maestro, on the other hand, simply gives you Perform. I figure this ought to be Perform(pick one).
Without this, I guess Eldritch Heritage is technically impossible to take with the Maestro bloodline, as there is no Skill Focus: Perform(all), only Skill Focus: Perform(some specific form). Hero Lab has this problem, BTW - it apparently looks for Skill Focus: Perform(all), and does not recognize (e.g.) Skill Focus: Perform(oratory) as meeting the Eldritch Heritage prereq.
Thoughts?
