What issues? Other than a little more stand off distance One sticks are the best all around stick on the mkt right now.
If they work for you great. But they are not for me.
Since you asked.
Let's not bring up that they are made in China or they have the famous Tethrd quality control, let's just look at the sticks.
I use sticks when conditions are challenging. Bigger trees, cold Temps, ect.
Each person needs to decide what is the most important features to them when choosing sticks.
For me the most important thing is climability. When I am climbing big trees I like to use my hands to grab the top step. With the combo stand off/step their is nothing to grab with the Tethrd or Latitude sticks.
Stand off distance for a guy with size 14 boots affect climability, again they both fail.
Aider friendly affects climabilty. I like cable aiders and versa aiders. I use both at the same time. Easy 4 steps per stick. Can't do that with the One sticks or the Latitude sticks.
How solid is the stick on a tree? Big question for me on both sticks.
Choice of attachment method again no choice. With my sticks anything goes.
The other thing that is important to me is packability. You can't beat LWCG single step sticks or the Shikar sticks.
OK I understand weight is important, but if I can't climb on the sticks the way I need to, to be efficent, what good are they?