I don't know, the Q50 is kinda meh to me personally
& now it has a lot of other tough competitors in it's class that are just as good or better like: ATS, IS350, 335i eating into it's sales, plus you could probably slot the other rear wheel drive sport sedan models at the Q50''s price point for potential buyers like Charger RT, RT/Scat Pack, 300C & Genesis even though they are classified as much larger cars.
Hopefully the new Q50 coupe due soon will be a stunner similar to the concept, which will certainly help bring in buyers, but Infiniti sales have also been hurting from a lot of their other older models which need a complete makeover.