Should Red Bull Racing use 2014 chassis (RB10) until at the rest of season?

Red Bull Racing today are struggling with 0 podiums and 0 wins. Unlike Repsol Honda in MotoGP, they use 2014 chassis until at the rest of season to return to title contender

Because the problem does not lie with the chassis, though doubtless it is contributing. The problem is with the engine. You can't win races with an engine that is massively down on horsepower compared to its rivals and is continuously failing!

I regret some things about Vettel leaving Red Bull, but this one most of all. Can you imagine the explosive temper tantrums we'd have seen by now?

It would more or less be the same effect. RBR had the best chassis in 2014 but have a mediocre one this year. Everyone else have improved aero (except Manor) so they would stay the same.
Renault is at fault only a little. I mean, if you look at where the cars were before the engine blew up, the RBR cars weren't exactly in great positions.