I don't know if there are but from my own experience I know that area borders divided into countless multipolygons make mapping extremely hard, especially for casual mappers who are not into advanced stuff like multipolygons. Other mappers have expressed frustration with this as well. And this can and will confuse new mappers who don't know anything about multipolygons and will be scared to touch them.

The main problem I have with this edit is that you restored multipolygons in first two locations I mentioned without changing almost anything else. Walls and fences around Ziedoņdārzs and Ivana kapi areas could have been easily added without recreating mps. You changed much more around south of Daugavas stadions so I don't have any particular complaints about those changes.

Again, if using this mp technique makes mapping easier, then keep using it. Just don't convert simple polygons to mps without any reason at all like you did in the first two locations. 