You can't not become interested when a player like Thiago becomes available, he's just something else in terms of talent. The biggest obstacle will be Barcelona as it seems they are very interested in him returning.
I agree in so far as a talent and what it would mean to many Barcelona fans. However, the current board (Same that sold him) cannot be relied upon to follow through and Segura has publicly been critical of purchasing Thiago - sooo, chances are not great for a return IMHO. Only hold out hope that the Rabiot talks break down completely