I agree completely!
In my opinion organizations spend large sums of money to create their Corporate Brand Identity and as such they feel that it should be the design cornerstone of all their courses. My biggest concern with this is that employees are often not connected with on an emotional Instructional level in their courses as these look similar to all other internal communications, marketing materials, desktop backgrounds and their intranet. Even though a company is (rightfully) proud of their corporate identity doesn’t mean that it was created with managing the attention and engagement of online learners. Let the course design elements rather support the learning that needs to take place instead of conforming to the company brand book.