Pakistan's imports fr India would be higher than exports yes.
BUT
We will be replacing less costly imports of vegetables, wheat, sugar from far countries with relatively cheap easy to get Indian alternatives. I mean we buy sugar from other countries for a price more than 20% of what India offers. This 20% is too much of a difference when you are talking about imports worth billions of dollars.
Other example is bikes and cars. The price that an Indian can gets a car or bike in India is almost 50% less than what we are being charged in Pakistan. Same car, same specifications, same model. Though less quality. Just compare the two markets and it's prices.
If we shift our imports from other countries to India. Even though maybe our imports will reach to $6+ . Still we will be saving atleast $2+ as compare to our current imports. These savings plus add our exports to them. And we are good