Well Russ,
There are different ways of reading Kanji, as there are multiple pronunciations of various characters. Mei reading itself can be annoying, though there are general templates one can follow, and with the right reference materials finding a mei isn't terribly difficult.
Kanji are more often than not kanji. Pre-modern kanji (that predate simplified Chinese characters) are in traditional style, but differentiating simplified from traditional is not terribly difficult, particularly if you have any experience with Chinese.
However, many things in the Japanese sword world are not very concrete. Even gimei can be valuable. You need to know the whole sword, and it needs to be in the right condition. If you just look at the mei and rust or if you just look at the hamon or hada style, or if you just look at the sugata and whether it's suriage or not...you are only painting a partial, limited picture.