Again, it was a way to improve Blaziken, who was outclassed by Infernape. They didn't know Speed Boost could make him more broken than the monkey. Also, they can't use Fire/Ground nor Fire/Steel on a starter. For the former, Fire starters are always given sub-par defenses, so the 4x Water weakness will make it worse (Swampert is backed up by bulk to make it not easily OHKO'd by a 4x Grass move), and for the latter, see if you can think of any idea for an animal that fits that typing.