Do I see accusations timed for damage as inherently implausible? Not necessarily, no. One looks at these things case by case, which is - you know - what is happening. The reaction to the first accusation was *very* muted, now that a second has come up, people are more willing to say "step down, handle it like a private citizen, but being in the role you are now is damaging".
As for AOC, you may think her proposals are idealistic, but that's how democracy works. People propose goals, or specific ways of achieving goals, and then they are discussed and if enough think it is a good idea, they are implemented. Trump proposed a wall. Most people think the idea is stupid as he describes it, so they are refusing to implement it. AOC has proposed a 70% upper tax bracket, hoping to move closer to the kind of tax structure associated with one of its most consistent periods of economic growth in US history. People will have to decide for themselves whether they think that policy would be effective. As you know, it is very popular, but will that popularity survive the nuts and bolts of figuring out full implementation?
Meanwhile, to stick to the thread title, Ivanka Trump says she is completely sure her family is in no legal danger whatsoever, and the Inauguration is being investigated as a cess-pool of corruption and payoffs.