The theory of evolution describes

a why some species eat only meat
b how all animals become faster over time
c how most animals hunt in packs
d how species change over time

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.