Yeah it would be harder but it would be better harder. And second you forgot the dinalfos of Tp. They are covered from head to toe in armor and have a shield which they use if you try to slash at them.
Ya know i would actually love enhanced ai for enemies. It would definetly add to the challenge. Like fighting off a pack of lizolfos. or maybe fighting off a pack of darknuts...>.< on second thought that would be too hard.