Roberts may be given a chance ( he will be part of the US summer tour) and would be the cheaper squad option and leaves more money for areas that need immediate attention.
The wings do need immediate attention.
Roberts is a bonus, if he plays well he can come in, play some games on the wing or in the 10 role and that'd be great, but you don't pass up an opportunity to sign one of the best players in the league, in a position you need, from a rival.
I can't believe there's even a debate to be honest. I thought people were against him replacing Sergio, which I understood, I can't believe there's anyone left who just doesn't want a world class player to come into a position we need another player in.