This topic seems to come up every month or so and is treated like it doesn't have a number of obvious answers. Here's a post I made 1 month ago which entails the simplest fix and just so happens to require the least amount of explanation to your feeble-minded league mates:
This "problem" has such an easy fix:
INCREASE STARTING LINEUP SIZE.
Based on OP's post, I'm guessing the starting lineup size for that league including K, D/ST and everything is somewhere in the range of 8; it needs to be bumped up to 10 at minimum, though it should be even higher than that really. And if you really want to separate the men from the boys you should add IDP, and I'm talking a big IDP starting lineup that's not far off the size of your offense starting lineup, if not equal to it.
I disagree..having a larger starting lineup gives you less choices to make on a weekly basis. making the correct weekly choices is a valuable skill component.
The further you go down the positional curve, the more similar players there are that you having to consider. So more options, not less.
In a 12 team, .5 PPR league...
If the league starts 12 WRs, there are 16 backups within 2 ppg of the last starter.
If starting 24 WRs, there are now 37 backup WRs who score within 2 ppg of the last starter.
Increase to 36 WRs, 3 per team, and now you have 46 WRs you have to decide between on who should be on your roster after the starters.
Go to 48 WRs, and there's 62 WRs within 2 ppg of the last starter.
Then take into account that if you start more players, you draft more players. So now you have additional comparisons to do for player value at any point in the draft and how it impacts your team/later draft picks. You also would have more backup spots, which means you have more players at the position on your team that you have to choose from each week. And as I already showed, there are far more similar players out there to choose from the deeper that you go.
The above is what we should expect, and my experience in large lineup leagues (1 QB, 2 RB, 1 QB/RB flex, 4 WR, 2 TE, 1 WR/TE flex) match those expectations. I tend to have at least 5 players most weeks that I'm deciding between for my flex WR/TE spot alone, and I often have far more than that. Because TEs bunch so close together after the top ones, I am often choosing between 4 TEs for my TE2 in a given week. I almost never have to do that for a league with 1 starting TE.