Actually it adding grip for me. I can use both Arc Pulse parts like support for my fingers. So if phone start to slipping from my hand, it always stops at bottom part of case.I had an Arc Pulse on my 15. The problem with the bare iPhone is its slipperiness. That “case” doesn’t help with grip in any way. I love the idea and it will protect the iPhone when dropped onto flat surfaces. It just doesn’t add any grip to help keep you from dropping.
I must say, that my previous iP14PM has better grip because of polished frames. Titanium is fine, but it's more matte.
I also mentioned when I have very dry fingers (typically outside when it's cold there) my Pitaka cases are very slippery. This is not happening wit naked phone and Arc Pulse.
Arc Pulse also make bigger distance between phone and table (when laying on it on both sides) so I can grab it more comfortable.
I think I will swapping time to time Arc and Pitaka. But thanks to Camera Control button I much prefer Arc and definitely not bulky cases without own CC buttons with just cutout.