I think Sage mode doesnt make sense when Naruto got his powerup with the kyuubi, i mean the sage mode improves his skills overall but the kyuubi chakra does it further, Sakura is the only character left who can fight with Sage mode all the way but it's highly unlikely that she will get it.
The only think Sage mode does that the cloak can't do is raise awareness. Naruto himself said he can sense attacks better while in Sage mode then when he's using Kurama's power. Other then that though, yeah the difference in power amplification seems drastic