reverted: this is not the main entrance to the residential building (I don't know its precise location), only an entrance to a hotel also located in this building

Yes, I just accidentally copied this key-value from the relation in which this house was the only member. Thanks for notifying.

reverted: everything was mapped correctly, one of the service roads in located on a bridge and leads into a building, there is no crossing with the road below as they are on different levels

Reverted: the name is spelt like this in English, see https://en.wikipedia.org/wiki/Petras_Vilei%C5%A1is . There is no restriction on using Extended Latin characters in name:en.

Yes, it's the same, and it was previously mapped by me more to the north: https://pewu.github.io/osm-history/#/node/10906078478 . When ks1v relocated it, as well as adding the building and the retaining wall, I did not argue, thinking that he knows better... Apparently not.

Yes, if you just climb over those metal beams (it's not really difficult), you can do down the stairs. I did that 2 or 3 times, and judging by the more or less beaten path, I'm not the only one.

partly reverted: the passage is possible, there is a fence with a stile node: way/1285003406

Mostly reverted in changeset/158303567 : the buildings have already been mapped

Ну вот конкретно для всяческих улиц Пятилеток можно проставить в name:etymology:wikidata ссылки на:
https://www.wikidata.org/wiki/Q1661958
https://www.wikidata.org/wiki/Q4127949
https://www.wikidata.org/wiki/Q4462653
https://www.wikidata.org/wiki/Q4515033
https://www.wikidata.org/wiki/Q18635124
https://www.wikidata.org/wiki/Q18643856
https://www.wikidata.org/wiki/Q47092870
https://www.wikidata.org/wiki/Q19873131
https://www.wikidata.org/wiki/Q7039206
https://www.wikidata.org/wiki/Q7700864
https://www.wikidata.org/wiki/Q5359806

Отмечу, что хоть "улица 4-й Пятилетки" и "улица 9-й Пятилетки" и были некорректно прилинкованы к записи о пятилетках, но есть записи на викиданных о конкретных пятилетках, и можно бы вернуть ссылки уже на них:
https://www.wikidata.org/wiki/Q4515033
https://www.wikidata.org/wiki/Q7039206

Partly reverted in changeset/158061623 : this path exists, even though it's unpaved and hard to follow

Ура!
Ещё есть жуткие "Новая улица" с подобными ссылками, из того, что видел.

So, what are the results of testing?
node/11497113302/history

Hi! All the Europroducts that I've seen around here are convenience shops, not supermarkets (you can check the difference in the wiki).

Thanks for the info! You've provided me with my today's dinner ;)

What was the purpose in removing Georgia name? For POIs in Georgia, the consensus is to provide the Georgian name (if any) in the "name" tag.

Reverted: the hotel is already mapped, node/11681819278
Other changes are messy.

reverted: this is not a proper name for the feature

Перенёс информацию из названий в соответствующие теги: changeset/156967758
(в name указывается только официальное название объекта, не его описание)

reverted: these are not entrances to staircases, these are just entrances to apartment blocks

Это бага последнего релиза ОМ. Во все редактируемые объекты, и даже в те, где ничего не редактируется, а только заметка оставляется, добавляется outdoor_seating=no. Ждём исправления....