I will bet anyone who does these mods will still have preferential wear on an apex seal (any type) depending on the application.
You can see a carbon apex seal I pictured on a Peripheral Port engine (which I personally ran for a cumulative 150,000km over 5 years testing & 3 different sets of apex seals!) will wear the shoulders down, this is due to lubrication deposition and not carbon wings.
There are plenty of examples I can give across all the forms of rotary engines and seal types I have extensive experience with where the biggest root cause is apex seal lubrication and other factors and not this "hump" or the area around the plug. You only need to look at the wear on the rotor housing to see a biggest factor for apex seal wear where the gas pressure is the highest is in the center of the seal in the lower sector of the housing and this is more so when the apex seal temperature is out of control... especially in turbo engines.
This is why we water inject cars 
My #1 mod for rotaries
