The argument, is shinra tensei 360 degrees or not? Proof it isn't and kiri is fine.

[Sharingan Itachi]

I believe that Shinra tensei, bansho tennin, and chibaku tensei are all jutsus that are developed by gravity control and all of them can be controlled freely such based on shape and scale as for:
Shinra: the god realm can control it freely the way he wants it he can make it on 360 degrees such as in this photo when he destroyed all the attacks from all directions
http://www.narutobase.net/manga/Naruto/423/2
or it can be controlled for deffirent directions like when he used three pushes against the frogs on this one
http://www.narutobase.net/manga/Naruto/434/9
as for the bansho tennin can can pull anything towards him or he can also control things with it and throwing it against his opponents like in here
http://www.narutobase.net/manga/Naruto/438/7
you can also see the next image after it in chapter 438.
And as for chibaku tense: he only can control the size and scale.