Agreed, it would be far more beneficial to have more missiles in a ready to fire state in their VLS and this current arrangement of 32 ready/32 on standby is sub-optimal. I'm hoping to see such changes on the P-15B that are set to be larger, more deadly, more efficient and more refined. Just have to wait another 2-3 years to see INS Bangalore and what she is packing
From what I've heard of the reloading system it is very much possible in war time and almost fully automated but the issue is it takes time (I'm told not much but still).
AFAIK the reloading system on the AB class's Mk 41 VLS cells requires a crane and top-loading. The reloading system on the VLS for BARAK-8 is quite different and are re-loaded from below and don't require any such external crane so quite different.