Really?
Questions regarding the distribution of screen time aside, what they need to do is step up the other three's writing.
Ruby has a clear goal, destination and motivation. She even has clear enemies! She hasn't had much character development, that's true, but her actions make sense and make her a compelling enough character; she's a hero without character development so at least she's where the plot needs her to be.
Meanwhile, the other three:
Weiss' enemy in V4 was herself repeatedly shooting herself in the foot out of a feeling of entitlement while her father understandably punished her for it (though he did so in a rather assholish manner) and Whitley just watched it happen yet is somehow presented as an antagonist despite his total lack of actual antagonism.
Yang spent all of V4 doing exactly nothing except trying to recover from her PTSD, and now that she's back on the road she's apparently looking for Raven for some inexplicable reason, rather than her younger sister whom she knows is on an important journey that place her in danger. Also she showed that she'd learnt absolutely nothing from her past mistakes by once again immediately losing her temper.
Blake abandoned everyone to run off to Menagerie to chill at home (placing her family in danger if Adam decides to finally bother going after her*), came up with one of the dumbest plans in the world to somehow stop the White Fang, and is now adamantly refusing to leave Menagerie after someone rightfully pointed out that it wouldn't work. She didn't even offer a reason why it would work or anything, she just randomly declared that she would have to be forced to leave.
*: I've heard people try to excuse it by saying that she was worried Adam would go after her family, but that's nonsense because Adam has been angry about the same thing and has known where her family lives since before V1. If he wanted them dead or cared about them being dead, they'd be long dead by now. Also that would go against Blake's stated reasons and actions. Also also she can't stop Adam if he decides it's murdering time.
Like...as of the end of V4 RWBY is the story of one heroine's journey to save the world, her heroic teammates (NJR, not WBY) and three unpleasant do-nothings who hog screen-time for some reason.
Weiss' writing took a step in the right direction in the first episode of V5 by reminding us that yes, despite her borderline psychotic behavior in V4, she's a nice person willing to risk her life for innocent people. Blake and Yang however only reaffirmed their issues.