My contribution has been to supply a chart reference; but, let's see here...
The first point is the need for meditation; I saw this sentence as being, "need to in order to
eliminate dukkha", rather than there being some inherent necessity. It's true to say this of all aspects of the eightfold path.
The second point relates to the meditation of the earliest Buddhists & is definitely worth trying to understand, but making unilateral claims is probably overstepping available evidence. Nevertheless, without making reference to people doing things rightly or wrongly, we can make reference to whether this or that method can plausibly be said to be an engagement with Samadhi (sammaviriya, -sati, -samadhi) or not; meditation methods are thick on the ground, but only some are efficacious with respect to Buddhist goals.
And rebirth has nothing to do with the practice, as Pāṭaliya was instructed. I don't even think Sariputta contacted rebirth-facts (?), and in any event contact with such information isn't required for awakening.