There's no point to argue whether the buffer is needed or not.
As I wrote, there's a lot of people believing it Glock perfection and being afraid of anything but stock.
I had buffers of several kinds during at least 20.000 rounds now and didn't realize any "something else" so far.
This test if just FYI.
If you consider reduced spring, heavy loads, faster shots or have elbow issues, you may find it useful. If not, I'm perfectly fine with your choice.