B-b-but.... they've given THIS idea up!
You were supposed to wait until tomorrow. Anyway, that's not what happens. The ones who are well settled in a niche don't change much. There are still protists. There are still fish. There are still amphibians. There are still reptiles. This is true despite all of these things having also spawned something different.
You seem to believe these things can happen at a rapid clip, despite the evidence in that there were many mass extinctions, which shut down the majority of the long drawn out changes that could lead to what we see today.
Tempo and Mode of Speciation. It can be fast, yes. Extinctions in particular figure in the adaptive radiation scenarios discussed at the end of that presentation. A lot of diversity is lost in mass extinction events but the surviving forms radiate into empty niches and evolve rapidly.
By comparison, the several different massive extinction events we see at their different levels in the fossil record (together with the horizons of appearances for different life forms) make utterly no sense against the YEC interpretation that the geologic column is the remnant of a single mythical worldwide flood.
A billion years with little to no change clearly flies in the face of Darwinian theory.
When you know more of Darwin than a novice in a nunnery you can announce what the implications of his theory are.
Deducing and reasoning among Evolutionists has lead to the fantasy of Punctuated Equilibrium. Sad really.
Unsupported question-begging. On what thread ever did you lay a glove on punctuated equilibrium? There's plenty of evidence for punk-eek scenarios happening.