I agree,
you have only 16% of 16+ STR, even with +2 bonus included.
the +2/+1 or +1/+1/+1 pushed the average from 10,5 to 11.
now the average array of 11,11,11,10,10,10 can become 12,12,12,10,10,10 or to have little diversity, average Joe has array of 14,12,12,10,10,8. arrange it how you will...