I'm probably higher on Q than most, but even so I have to admit you are correct. Q has shown the ability to be a L1, at least to me, but he has yet to solidify the role. Part of the reason, imo, is that he has not gotten the chance with Kopi on the team, but even so he has to earn it. I would say he had dethroned Danualt as L2 center, which is a great step forward considering Danault was a L1 center on a Canadians team that made the SC Finals (which is not to say he ranked as a true L1).
With 5 forwards I think there is room on PP1 for both Byfield and Kopi, but no longer Doughty. Given Kopi, Byfield and Kempe are all solid 2-way players the Kings can get away with not have a D on the PP, but I agree with you I highly doubt Hiller can sell Doughty on that (or will even try).