this is a new phenomenon, at least at these multimillion-dollar levels. And it's a very troubling one in the eyes of some investors.
Not troubling in general, nor even to investors in general. Just troubling to some investors. What's bad about the balance of power shifting toward founders when it was so unbalanced the other way for so long? Let's remember where the pendulum is swinging in from: a few months ago there was a video of Silicon Valley in the 70s with stories of entrepreneurs giving up 98% of their companies in order to raise any money at all. The real story here is the long-term trend.
Is there evidence to support the claim that these deals diminish companies' long-term prospects? There isn't any in the article.
Goldhaber said it sends a signal that entrepreneurs don't believe in the long-term prospects, and makes VCs question whether they should.
Obviously not the VCs who just signed the deal. Seems like markets behaving like markets to me.