In 1.12, /entitydata was able to change the data of multiple entities at a time. In 1.13, it was replaced with /data, which was okay, but the ability to target multiple entities disappeared.
Yes, I believe that villages need to be bigger, like the old ones. All villages I've come across have like maybe 4 houses, and they're tiny. Old villages usually had more than 8 houses, and their f...