Both swedish and american NASAMS are coming with the ability to choose the exact amount of which missile they wish to bring, either full 6 tubes of 9X/Amraams/AmraamER or a mix of them.
This is a very good and nice feature already present on the SPYDER and should in my opinion be added to Tan Sam Kai TELs as they have essentially the same capability of fielding either an ARH or an IR missile. It would help an already extremely badly performing SPAA somewhat as you wouldnt need to wait nearly 20 seconds to switch between ARH or IR missiles but would be able to switch to them on the fly improving its performance.
Sometimes ARH (as weak as it is) is the better missile for the situation, and other times you want the IR missile and cannot afford to wait ~20 seconds to switch all 4 missiles out.
This would also improve its performance in that the ammo box would reload the system faster be it one missile at a time.
Given that other systems have the choice of deciding how much of what missile to bring this would bring it slightly up from its current state without too much bother while improving the player experience a lot.