Okay, after putting myself in BB (makers)'s shoes & a lot of neutral soch-vichaar, I have realized why BB wanna save Jaan & evict Shehzad. Because in the long run, it's more beneficial to keep Jaan around for the house's dynamics.
Jaan in a way impacts the dynamics of the house.. like a good chunk of last night's episode showed the crack in the 'friendship' between Jaan, Nish & Nikki..& how after listening to Rubina, Nikki realized her friends are double dholkis.. as all week they never pointed out when she went wrong, but before the entire house they threw her under the bus.
So now, this is an interesting narrative to milk further & has potential for future milking as well -'kya toot jaayegi Nikki, Nishant & Jaan ki dosti?' 'kya Nikki ki wajah se aagayi daraar Jaan/Nish ki dosti me?' 'kise chunegi Nikki -Jaan ya Nishant?' etc.😆
If Jaan leaves, it'll be a missed opportunity for the makers.
On the other hand, Shehzad is a non-entity in the house, he has nothing going on with anyone, he could've milked his rivalry with Nishant by locking horns with him more or fighting Nikki's group as he don't like them, which he didn't.. so if he leaves, it'll not impact the house's dynamics at all.. & there's pretty much nothing to milk outta Shehzad in the future.