Bobby is a 9, Shaqiri is a wide forward.Shaqiri and Firmino for the #10 position is more than enough.
We need to replace Origi and Sturridge with ONE player who can play upfront and left wide - like Werner oder Depay for example.
Both can play '10' to a certain level, and in a squad that needs versatility that's great.
But they are not, in my opinion, top class attacking midfielders who do the job at a similar level, and/or in a similar way, to Coutinho and Oxlade.
If we're talking about having a best 11 that can win the big matches against the best sides, we need better in the central attacking midfielder area of the pitch - whether you see that as a 8 or 10 - than we have in Bobby, Shaqiri, Lallana, Keita (until proven otherwise), Oxlade (until we see what level he comes back).