It's a common misconception that Amiibo are supposed to learn to fight like their owners. Virtua Fighter 5 had a system where you could train an AI to react in certain ways and learn your combos, which is what players seem to want from their Amiibo, but from my experience with a Toon Link and Pikamiibo, this doesn't appear to be how they learn and function. Amiibo appear, to me, to function as an AI which learn simple cause-effect relationships based around Level 9 CPU behavior. In other words, simple ratio things such as "doing this gets me hit." This simplicity, though, can also lead to bad behaviors, because of logic like "thunder hits people often."
Long story short, I think Amiibo are fun, but aren't designed to mimic player behavior. What you are likely doing is tweaking CPU behavior to favor rewards a little more than normal CPU, with the bonus of a massive stat bonus.
PS: Real talk, though: if Smash had VF5's AI training, that is, Amiibos that a) learn your combos, b) can be trained to react to situations, and c) you can coach during matches to encourage or discourage specific behaviors, e.g. "YES!" when Pika side-dodges or "NO!" when Pika spams Thunder as a non-edgeguard... no natural force on Earth could stop Nintendo from taking my money.