In my opinion, there are not enough people/visitors, that fish in Yellowstone Lake. Lake Trout are also more difficult to locate, because they inhabit deep water for most of the year. Yellowstone Cutts are easier to catch, so that is what visitors target.
I don't think it is realistic that Lake Trout could be eliminated from Yellowstone Lake. The Government Grant is only to study what the best course of action would be. Here is a Quote from Phil Cooper, Idaho Fish & Game, Topic: Lake Pend Oreille: "It's not realistic, nor is it our goal to eliminate lake trout completely from Lake Pend Oreille but what we want to do is manage lake trout at a level where they don't risk collapsing native cutthroat and bull trout populations; or important sport fisheries, like kokanee and rainbow."
End Quote.
Doug