These are fine
Overall, he got $157 for cards worth an estimated $328, pretty close to 50 percent of the estimated value
Healing Technique Healing Technique is a decent way to respond to aggressive and removal-heavy decks
(...) From what I can gather from the official product page, there will be sanctioned drafts, which means the above rule will indeed prevent you from searching anything else but the cards in your Sideboard (meaning that you drafted, but didn't include in your deck), and as you correctly stated, there won't likely be any banned or restricted cards to find there, as the set itself is legal during it's own draft
At 120 cards, Pitch Black is the smallest set in the Mega Evolution block so far Creatures has stopped releasing Japanese subsets for now, so each English set maps to a single Japanese set, and ongoing Pokmon TCG print shortages may also be a factor in the smaller card count