Less so that the Kfir Canard should be lowered. You should use its exeptional speed to get a huge advantage at higher altitude fighting with top down missile launches. The J7D should be 11.0 and the bis is fine where it is.
This is not the tier where you should focus only on missiles because its flight performance is insane when played right. Same goes for the F5E at 11.0 which is better than the J7D and Bis even though it only has 2 9Js. it gets annoying where a plane has both great flight performance and insane missiles like the J7E or F5E FCU.