I was wondering about this as well, as it does affect the game quite a bit. For example, upon hitting tab as humans I realized the enemy team was full of only granger. This allowed me (on humans) to freely and safely get a successful base move early game. This ofc has huge implications on the result of the match.
Personally I'm not a fan of this feature. As I stated in another post one of my favorite aspect of gameplay is collecting information and decieving the opposing team. Ideally I would love for this display to be changed to "last seen as" much like league of legends does with items, but if this is not possible or is difficult to implement I would prefer this display to simply be removed