villager growth and advancements

This one could be controversial, but baby villagers aren't babies that long. They should grow in stages

Day 1- Baby

Day 2- Student

Day 3- Intern

Day 4- Adult

The way this would work is Day 1 would be the same as normal, Day 2, the villagers would be able to trade and learn best trading skills and grow 1/2 block and still play around also. Day 3 would be the villager is learning their jobs from grow villagers. Day 4 is grown like normal. With this comes trading benefits, When a villager advances in rank, the would provide better and rarer trades.

Also, if you played with a baby villager they should give you discounts every now and then on items