About the bonuses ... I agree, getting 4 points for 100 as opposed to 99 is not really a good system.
My standard is to give 1 point for 100+ yards, then I give an additional 3 points for 200+. You might argue 199 is one yard less than 200, but I think bonus for good performance should be awarded and there has to be a cut off somewhere.
Anyway, most leagues are:
1qb, 2rb, 2wr, 1te, 1k, 1def, 1flex (rb/wr/te)
and I think 7bn is standard with 1 IR spot.