1. Other than its historical references, what are at least two other reasons that the discovery of the Beowulf manuscript is important?

One of the reasons why it is important is because it is giving the people good intro into poetic concepts that are important when reading literature. It is giving people an insight into epic kind of poetry and many other poetic elements such as alliteration, metaphor, imagery and more. It is showing the people what is accentual verse and more.
Another reason is also related to poetry. People can see how the poem id developing some of the universal ideas that are including the good of life, glory, and struggle between bad and evil, good and bad kings, heroes and heroism.

There are many reasons but also, people can understand Tolkien's work while reading the Beowulf manuscript which is considering understanding of Old English world, culture, and language.