2. That would actually be good, the amount of models aims at confusing customers. But also: Why would that happen? Many models can (and do) share the same spare parts.
3. Prices are already as high as they can be. They do not get lowered because production gets less expensive, they get lowered because of competition. This might have an effect on prices if the competition was very high and profit span very thin - which might be the case for the cheapest budget phones. For something like an iPhone? To my knowledge they are already utterly overpriced, as is tradition (https://www.forbes.com/sites/ewanspence/2017/11/08/apple-iph...), then it will have no effect there.