I don't know how deep I want to delve into the relationship business, as I find it more a distraction than a selling point for the series, but I guess there are several points I can offer.
I noticed this also. It could make the case that it was Velma's idea all along to initiate a romantic relationship with Shaggy...
It seems quite clear that Velma is the one that wants this relationship with Shaggy. She is seen several times pushing for time alone, and initiating intimacy. (A nice way of stating it on an all ages forum, no?) Most of the time Shaggy is shown as dragging his heels. Initially, I can easily see Shaggy taking the approach of "Hey, I'm not that interested, but an attractive gal is into me, so why not? Besides, I value Velma as a friend and Gang member, and don't want to make her mad. So as long as it doesn't cost me anything..."
Unfortunately, from Shaggy's point of view, this relationship started to cost. Velma was making demands on him that he was not comfortable with. (Whether those demands were reasonable or not really doesn't matter.) Finally, he did what should have been done from the beginning, and told Velma that he did not share the same feelings she did.
No one likes rejection, and the only thing worse is
public, humiliating rejection. As people learn as they mature, your enemies can't hurt you, because you don't care what they think, and you expect the worse. It is the people you care about that can hurt you. Unfortunately, Velma had expectations of Shaggy that he could not meet. So I guess it is normal that Velma's better nature has been (temporarily, one hopes) overtaken by bitterness and the desire to strike back.
(As an aside, I don't watch this series because I want to see a realistic portrayal of teenagers and young love. I want to see the rather unreal Gang that I have come to know and love over the years. So Snarky-Bitter Velma can go away any time now.)
I also wonder why it's Scooby of all people trying to mend fences. Not that he shouldn't, but that Shaggy should be the one trying to improve relations with Velma.
Shaggy and Scooby are trying to get back what they had before--they are trying to be Velma's friends. Only Velma can choose whether to accept that or not.
And it seems that in the last couple of episodes Velma is saving most of her "Hey! Look everybody, I'm hurt!" for Scooby. She has already admitted that she can't stay mad at Shaggy, so poor Scoob gets the blame and the bile. Again, a reaction that is believable--but not reasonable. (See aside above.)
On a different note, I've seen the CN premiere page for November and unfortunately there's nothing new all month long for Mystery Inc. Curse you CN!!
I hadn't given it all that much attention, and I recorded the Monday night showing as usual. My disappointment upon discovering a rerun episode was profound.
GLT