If we increase cra port number from 4 to 2 for 4T4R will traffic increase?

Hi All,
If we increase cra port number from 4 to 2 for 4T4R will traffic increase?
My mcs is increased and cqi is degraded, so can I implement DL flexible bler feature and cqi adaptive?With less initial adjust meant to improve cqi?
Will it work?
Vendor is Huawei.

Better trial the feature in small clusters with different type of clutter, terrain, or demographic.
We’ll have better profiling over those clusters.
It worked quite well, since not all NE suitable for certain features.

Yes, you will get 3 dB gain in UE side but will loss MIMO gain.
It is good to use it in road and rural where you have coverage issue.