I meant the larger linkshells would have an upper hand over the smaller linkshells. My linkshells consists of around 8 members so we can only do 1 NM at a time. If a group has say 16 members they can do 2 NM's at a time making them more time efficient than my small linkshell.
Also, if you have a 15 man group going after one NM the competition and time efficiency will be the same if you have an 8 man group going after one NM and a 7 man group going after another. That is if each given linkshell each has their turn at a claim. I'll go ahead and say this change is no different from 15 man groups, but it is in reality nowhere near worse.
I don't know about your server Tubala, but the only NM that actually has competition on mine is Dodore and the most I see on a busy day is 4 linkshells. The rest almost never have any competition.