I am writing a mock memo for a university assignment, addressed to a current professor. Thus, the general tone and genre of the letter is definitely formal. I am trying to say the following:
(The website in question) has changed its web technologies and layout within the past year with the intended goal of improving general user experience. However, the exact opposite has occurred, because...
Using "the exact opposite" doesn't sound appropriate for this type of letter. At least it doesn't to me.
Is using "the exact opposite" in this formal context appropriate? If not, what other phrasing would you consider using instead?