Why does DICE always try to reinvent the wheel?

Them trying to reinvent the wheel wouldn't be such a problem if they didn't keep adding more corners to it.

But if I had to make an educated guess, a lot of it is the more long-time employees quitting the company, and the less experienced replacements are left doing their best to make a facsimile of previous titles, because the Frostbite engine breaks all the old assets every time they update it.