It is plainly obvious that the husband-wife couple is the reason why this season needed so much external boosting. They are in a house full of contestants and right from the beginning they don't mingle with others. They (especially Rubina) would look at the task to find loopholes than actually perform the task. From the POV of audience, tasks not being completed is boring.
BB, early in the season, tried to highlight this problem - even showed the contestants how boring they look laying around and not talking much to each other. When nothing worked, "challengers" were called. Even that did not wake the couple up. Only Ejaz (at the time) was seen mingling with them while miya- biwi continued to sit separately. This is not entertainment.
Miyan-Biwi was more interested in reading the task instructions hundred times rather than actually doing the task. Then, ever since there is no captain in the house, Rubina controls the kitchen, and thanks to kitchen politics she gets noticed. Otherwise, all the couple does is spew their insecurity filled poison against Ejaz and Rahul.
I actually wanted to see how Rubina would play if she was taken out of her comfort zone. Abhinav should have been out months ago. So now we are left with a couple who has made BB house their defacto home and others are just playing for time until the season finishes.
Please notice next time the look on their faces when BB calls Rubina to read out every damn instruction. Rubina is not the only good speaker in the house. Ejaz and especially Rahul speak very clearly. At this point, even the contestants know that Rubina is being propped up by BB. Camera will also be on the person reading out instructions and iss bahane BB makes sure Rubina kuch kar ya na kare, she will still be made visible.