I think I know why some players are complaining about the new preseason...
This is my prediction, so no hate please.
I think the majority of the players who are complaining about the runes/blue essences change is because they are the players that cannot afford the time to play a lot or are new players due to work, school, errands, etc.
Now that I think about it, the people who are complaining about not gaining enough BE is probably because they don't have enough time to play at least 10 games a day and feel like earning BE will be such a pain for them due to slow progress on leveling up, which results in getting less BE, whereas others who do have the time and are able to play for a long time find the change not so difficult towards them.
For the rune changes, I don't know, I feel like it's alright, it's just that some players are lazy to search up the runes for each champions they play. Some asked for more free rune pages, but this is kinda unnecessary since you can change rune in rune pages.
Not going to lie, but I was in the same position to the players who are complaining about the changes. I did asked why did Riot made these changes and even explained my thoughts on it yesterday. But after some thoughts and consideration, I feel like Riot did nothing wrong in the preseason changes, but for the players that don't play a lot/new, it kinda hurts them since they do want to play League but just cannot have the time to do it.
But again, Riot does have surprises, it's just been a day since the release. Maybe they will improve things that might be favorable to everyone. To those complaining, just give some time, this is a new system that we need some time to get used to and perhaps in the future things will get better.
[slayer-jinx-catface]