If this is about hiring for talent, then Yahoo is in serious trouble. I will give her this - people are talking about Yahoo again. Some of that was the old board, but she deserves some of the credit too.
I don't know if this solves Yahoo's "core" problem or if they even have a "core" problem as opposed to a shitload of small problems. I know I'm not sure about a lot of what Yahoo has done over the last year, and I'm pretty skeptical if Yahoo can even be turned around but I'm giving Marissa at least 3 years before making any judgements.
Each of the acquisitions tells us more about what Yahoo wants to be. Thus far, it's been dilutive to the brand but overall strategic. I have faith they will integrate these products and teams much better than they did in the past.