In regards to strikers I do think the burden will be a lot less next year. If Hazard plays consistently the whole year, and not just and the beginning and end, I fully expect him to get around 20-25 goals in all competitions.
Also stating Lukaku wouldn't be up to the Champions League. It was Oscar's first time in the CL and he seemed by far our best player for the few games we played in there this year. Whether he'd continue his form into the knock-out stages remains to be seen. Even if Lukaku lacks experience, he still has is physique. Having that much raw strength and speed, and being that size surely helps when your struggling. You'll always make an impact.