Why did it reduce the frequency of Fireball?Because the wizard could not cast fireball in every combat round and the eldritch knight could not always use shield in every round.
Suddenly our monk could keep up easily with those characters, as short rests happened a lot more.
What is the difference between camping for 8 hours and camping for 24 hours? Isnt it just as easy to do one or the other? Why did this impact long-rest features?