To those saying there will be less star-rated difficulties; let's do some calculations!
I have 99%-100% of ranked catch maps, so I will be using "~" since I'm not claiming it to be 100% accurate due to osu being weird with it's database showing maps. However, it's probably 99.9% accurate nonetheless.
Now that I have that out of the way, here are the numbers.
Below 1 Star: 32~
1 Star: 1,603~
2 Stars: 1,989~
3 Stars: 1,608~
4 Stars: 1,503~
5 Stars: 1,079~
6 Stars: 473~
7 Stars: 166~
8 Stars: 63~
9 Stars: 24~
10 Stars: 6~
11 Stars: 1~
Total ranked maps: 8,547~
Now, there are 7,814~ ranked maps that are 5.99 stars or LESS, accounting for 91.4%~ of all ranked maps.
This means that generally speaking, you can play all the way up to beginner overdose maps being 5 stars and you have 91% of the content of the ranked map section.
Want to play 6 stars and above? Now you can only play 8.6% of the total ranked section.
6 star maps generally give you 400 - 699~ pp, depending on drain time and if it's closer to 7 stars.
Want to be a top 100 player? You basically play 7 stars or above; more often than not, more like 7.5 and above. For simplicity sake though, let's just go with 7 stars.
That totals to 262~ ranked beatmaps in total; equating to a THREE PERCENT.
3%.~
Let's now do some more calculations. Let us now include the parameter "length<=210" meaning, all songs now shown are going to be 3 minutes and 30 seconds or less.
We will also show the percentage difference from the total number.
Below 1 Star: 31~; -3%~
1 Star: 1,542~; -4%~
2 Stars: 1,854~; -7%~
3 Stars: 1,349~; -16%~
4 Stars: 1,173~; -22%~
5 Stars: 756~; -30%~
6 Stars: 256~; -46%~
7 Stars: 68~; -61%~
8 Stars: 13~; -80%~
9 Stars: 9~; -62%~
10 Stars: 2~; -66%~
11 Stars: 0~; -100%~
So what does this tell us? the numbers show the second we get to 7 stars and above, on average, you lose about 73.8% of maps, and if we take out the one 11 star map, you lose about 67.25% of maps on average.
What is 67% of 262? 175 beatmaps lost, bringing that grand total of maps of 7 stars and above that are less than 3 minutes and 30 seconds long to 87 beatmaps!
Wow. 87 beatmaps, (well 87 - the one 11 star so 86). There are literally less than 100 beatmaps that are shorter than 3 and half minutes. Sounds like a lot of fun to farm in the endgame ranked section!
All this to say, this is why there needs to be a change. There is a a MASSIVE disparity between the amount of ranked maps of higher star rating beatmaps and 5 star and lower.
+1.
edit: 7 stars and above that are equal or less than 3:30 have 92 in total.