Her exit transitions from WC:
3Z - outside spread eagle (not a very pretty one but still evident)
This is an example of busywork in choreography these days; such a thing shouldn't automatically count for anything special. A skater doing a weak spread eagle after the point a jump landing should be considered "concluded" has nothing to do with the quality of the jump itself. Maybe it can be good interpretation of the music (but in Medvedeva's program isn't anything special in that regard either), being able to highlight a moment of delicacy, but it isn't impressive otherwise.
Also, spread eagle exits can sometimes just mask a faulty landing and these shouldn't count as any kind of special transition or landing at all (a recent example would be the one Hanyu did at the end of throwing in a 4toe+3sal combo). When you land a jump your body is naturally going in that direction anyway and putting your free foot down is naturally a way to steady extra momentum from the jump that wasn't able to be controlled otherwise. A real spread eagle exit transition directly from a jump should show some speed and control.
how can a skater do transitions *directly* out of landings
Oh please. People have shown twizzles, spirals, power pulls, spread eagles, and leaps directly from landings. And what do you think a +Loop combo is? The skater transitions immediately from the landing of a jump into a Loop jump. In the past people did double axels directly into spins too.
Bonus for a difficult exit should be exactly that - difficult. And yes the connection should be quite immediate to count, otherwise it should be viewed as something just for the Transitions (and hopefully Choreography/Interpretation) component, not as GOE bonus for the jump itself.
Remember the "good extension on landing" clause too; if a skater is hurting the speed and extension of their landing in order to then be able to do a transition a second later, it doesn't show something special about the jump. It just becomes a choreography choice.
Evgenia is getting those +2's on every jumping pass throughout her programs
Because of bad judging. Her double axel elements should be +1 at most and frequently 0 GOE, such as the 2A+2T+2T combo she did at Worlds. A bunch of tiny, barely-rotated jumps and no speed coming out. An arm over the head doesn't impress me there, it doesn't make up for all of the other lacking qualities. And of course her Lutz and other jump combos are getting free passes when they shouldn't be.
The one thing that can be said about Medvedeva's skating as compared to the Senior field last season is how seamless it is (although Miyahara did that too, but with even more problematic jumps). She is getting overscored on GOE's, her skating skills and transitions are not worthy of 9+ PCS, there's very little about her choreography that is truly spectacular, and the interpretation of the music is questionable, but she does perform the material she has with a considerable amount of naturalism and unity.