After, let's say, 50 missing blocks in a sequence, the witness have the value of their received votes divided by the count of sequential misses after the 50^th having the count decremented for each successful block until reaching 1.

Here is the superficial pseudo code expressing the idea I had:

Starting with:

count_missed = 0;
miss_threshold = 50

For every assigned block:

if ( missed_block ) {
    count_missed++;
}
else{
    if( count_missed < miss_threshold )
        count_missed = 0;
    if ( count_missed > 0)
        count_missed--;
}

if( count_missed > miss_threshold ){
    computated_received_vesting_votes = received_vesting_votes / (count_missed - miss_threshold);
}
else{
    computated_received_vesting_votes = received_vesting_votes;
}

As I said, it was just an idea I had while looking at witnesses among the Top100 who happen to be missing blocks in sequence for many months.

I know witnesses can retire, temporarily deactivate and all other possibilities, but they already have the possibility of using the deactivation key_{(STM1111111111111111111111111111111114T1Anm)} for disabling the witness.

I don't think this would be a bad thing for the witness itself as it would prevent their misses from increasing too much and also help to keep the network stable with less missed blocks.

As I said, it was just an idea. Feel free to comment your thoughts below.