I'll have to wait and see on this one. I could see how the math might work against others in line. For example, the "boats" hold 8 people. Very few groups arrive with that number. And very few groups arrive with 7 people. So if a family of 5 takes the first 5 seats on a boat, will the CM ask whether there are any parties of two or three in line who can fill the boat as they do now, or will the CM just reflexively pull three people out of the single rider line? And if the CM does the latter, there is a decent chance that several of the "single" riders will actually be together, and hence be able to ride together as if they had a FP, all at the expense of an actual group of three who might otherwise be called up to the front. I don't mind filling a roller coaster with single riders where they always fill a literal "single seat", or at TT where the odd configuration of "three across" makes using single riders a good choice. But a vehicle that holds 8 people looks to me as if it can become the subject of abuse, unless the CMs really do use the line to fill the 8th and final seat of that boat. But I suspect that laziness and the path of least resistance will cause CMs to take two or three people out of the single rider line to fill boats with five or six people in the boat, and that would be great for the single riders, but a negative for the people who actually have a FP or waited in the SB line. Again, have to wait and see on this.