Bellingham effect is really hard to deny of course. He has been playing extra since the beginning of the season. He is the main scorer of the team now.
Jude Bellingham is one of the best footballers in the world, and Real Madrid are lucky to have him, if they are to be successful this season, he'll definitely play a huge part in it. Having said that, i think it is still too early to conclude if Real Madrid are a better team with Benzema in it last season than they are now, i know they weren't really successful last season, they could only win the Copa del rey, but they have also not won anything this season yet.
Having said that, i think if Real Madrid don't get a striker in January, it might affect them when the season gets to its closing stages and every game becomes extra important, they are getting the goals now, but a time might come when they need an orthodox striker to get the job jone, i just think so, even though Jude Bellingham and his teammates could very well prove me wrong.