McIlroy has done well at East Lake (first, 16th, second and 10th).
"This is a significant and exciting change for the PGA TOUR, our players, our partners and - most importantly - our fans", said Monahan.
But the PGA Tour is hoping to generate similar drama regardless of which player is in the hunt. Holding a regulation tournament and giving a player a 10-shot head start didn't sit that well with a few.
Starting in 2019, whoever finishes the Tour Championship at the lowest aggregate total including the staggered bonus will be the tournament victor as well as the FedEx Cup champion.
Almost three months after the PGA Tour ended another run outside golf-rich Washington, the PGA of America announced an agreement for the club to host the Women's PGA Championship twice, the Senior PGA Championship twice, the PGA Championship (2031) and the Ryder Cup (2036).
Keegan Bradley, the victor of the BMW Championship two weeks ago who enters this week ranked sixth on the FedEx Cup point line, said, "It will make for interesting viewing for sure".
The changes were the end result after extensive research and feedback was received from the PGA TOUR members, media partners and the TOUR's 5,000-member fan council - an "important sounding board", Monahan said.
However, the 12-time US Tour victor says capturing this week's Tour Championship in Atlanta and having a series of results fall in his favour to claim the FedEx Cup would allow his season to end on a high.
After the Wyndham Championship, the last tournament before the start of the FedEx Cup play-offs, the regular-season points leader will receive $2m (£1.5m) from a $10m fund shared among the top 10. The next four players will start at 8-under through 5-under, respectively.
The next five in the rankings will begin at four under par, with scores regressing by one shot for every five players until those ranked between 26th and 30th, who will start at level par.
Congressional, across the Potomac River in Bethesda, Maryland, previously hosted the 1976 PGA Championship won by Dave Stockton, whose 1-over 281 remains the last time no one broke par at the PGA Championship'.
Following the Wyndham, the top 125 players advance to the Northern Trust via the same points system that is in place now.
The Associated Press reported on the format changes for the Tour Championship three weeks ago, and players have been mulling over them. That part's a little bit of a bummer but we're just going to see how it unfolds and hopefully it turns out well. From there, the top 70 will move on to the BMW Championship, with points quadrupled at the first two playoff events.