Something has happened to Goodreads' reviewers over the last 3 years. Maybe they are all taking the same drugs. If you compare my scores for G/BRat from 2018 to 2022 they consistently go down. But if you compare the Xcp3Rat for the same book 3+ years apart they go up.
Shards of Honor by Lois M. Bujold - - - - - 1986
9852• 9178• 4468• 902• 221 on: Nov 28, 18
G/BRat= 16.946 Xcp3Rat= 2.405 Star3Prd= 40.76
24621 ratings with a Mean: 4.12
SF density 0.509; Fantasy density of 0.060
13,079• 12,809• 6,350• 1,379• 431 on: Aug 31,2022
G/BRat= 14.302 Xcp3Rat= 4.592 Star3Prd= 65.672
34,048 ratings @ Mean: 4.08
Barrayar by Lois M. Bujold - - - - - - - - 1991
9807•7481• 2554• 342• 97 on: March 27, 2018
G/BRat= 39.38 Xcp3Rat= 3.864 Star3Prd= 152.16
20,281 ratings @ Mean: 4.31
SF density 0.425; Fantasy density of 0.071
13,147• 10,086• 3,444• 535• 220 Sept 2, 2022
G/BRat= 30.772 Xcp3Rat= 7.700 Star3Prd= 236.953
27,432 ratings1,151 reviews @ Mean 4.29
Memory by Lois McMaster Bujold - - - - - 1996
7480• 4585• 1285• 102• 13 on: October 23, 2018
G/BRat = 104.913 Xcp3Rat = 5.422 Star3Prd = 568.84
13,465 ratings @ Mean: 4.44
SF density 0.447; Fantasy density of 0.038
9,765• 5,948• 1,665• 218• 121 on: Aug 30, 2022
G/Brat= 46.351 Xcp3Rat= 10.903 Star3Prd= 505.36
17,740 ratings 861 reviews @ Mean 4.41
Komarr by Lois M. Bujold - - - - - - - - - 1999
5292•4976•1530•117•16 on: March 29, 2018
G/BRat= 77.203 Xcp3Rat= 3.788 Star3Prd= 292.44
11,931 ratings @ Mean: 4.29
SF density 0.847; Fantasy density of 0.018
7,458 • 6,744 • 2,032 • 256 • 124 Sept 2, 2022
G/BRat= 37.374 Xcp3Rat= 7.907 Star3Prd= 295.51
16,614 ratings 635 reviews @ Mean 4.27
A Civil Campaign Lois M. Bujold - - - - - - 1999
7910• 4488• 1412• 162• 38 on: November 26, 2018
G/BRat = 61.99 Xcp3Rat = 5.090 Star3Prd = 315.53
14010 ratings @ Mean: 4.43
SF density 0.348; Fantasy density of 0.047
10,139 • 5,843 • 1,851 • 303 • 148 Sept 2, 2022
G/BRat= 35.437 Xcp3Rat= 10.004 Star3Prd= 354.499
18,284 ratings 900 reviews @ Mean 4.40
Captain Vorpatril's Alliance by L M Bujold 2012
4374• 4503• 1630• 222• 57 on: March 27, 2018
G/BRat= 31.817 Xcp3Rat= 3.058 Star3Prd= 97.3
10,786 ratings @ Mean: 4.2 LMB.CptVorp.txt
SF density 0.398; Fantasy density of 0.023
6,412 • 6,207 • 2,267 • 365 • 158 Sept 2, 2022
G/BRat= 24.128 Xcp3Rat= 6.273 Star3Prd= 151.367
15,409 ratings 1,389 reviews @ Mean 4.19
The Player of Games by Iain M. Banks - - - - 1988
30,566 • 25,694 • 8,194 • 1,473 • 459 Sept 2, 2022
G/BRat= 29.120. Xcp3Rat= 7.799 Star3Prd= 227.09
66,386 ratings @ Mean 4.27
The Mote in God's Eye by Larry Niven - - - - - - - 1974
19858• 20949• 10588• 2030• 539 on: March 27, 2018
G/BRat = 15.884 Xcp3Rat = 2.161 Star3Prd = 34.33
53,964 ratings @ Mean: 4.07
SF density 1.425; Fantasy density of 0.055
25,305 •25,681 •12,729 •2,555 •856 on: Sept 3, 2022
G/BRat= 14.948 Xcp3Rat= 4.502 Star3Prd= 67.303
67,126 ratings 1,921 reviews @ Mean 4.07
There is no data for The Player of Games for 2018 but curiously it has the exact same Mean score as Komarr for 2022. I have been trying to figure out why the Means would remain so constant while both of my ratios change so consistently in opposite directions over 3+ years.
A lot of reviewers seem to not care about mediocrity anymore. Everything is either good or bad. So they rate 4 or 5 for good and 1 or 2 for bad, so the 3 stars don't increase as much as the others. 3 stars have no effect on G/BRat and 1 & 2 stars have no effect on Xcp3Rat.
Older readers are going to drop out of Goodreads over time. Maybe 3 years is long enough to show that effect. Younger readers may have no appreciation for nuance.