Would be so much better if it were, especially for n00bies.
There is an option there on the upper right corner of software center.
By Top Rated (Default)
By Newest First
You should change that by Name.
Seems to me that it's better for beginners if it's categorized, not alphabetized.
If someone knows the name and wants to find it, all they need to do is type a few letters into the search box, and it will be located, which is easier than looking for it alphabetically.
I really don't see why it would be so much better if it were alphabetized; can you give a use case to illustrate why you think this?