Some rules are just inherently too broad
In some ways that is a good thing and a bad thing as it allows situations to develop without too much external force but also the fact that they are based on admin discretion. When staff members' discretions conflict, it would very obviously result in many disgruntled players as the hypothetical (and from my experiences real) situation mentioned earlier, i.e the construction scenario, occurs with many players not knowing up from down because of too many "opinions" on how things like that should be done.
As in differences in punishments, I personally believe not having strict "guidelines" for bans is more advantageous than disadvantageous as it allows to exercise human judgement rather than just say "it says in the book that killing one person for no reason is 3 day ban and you killed 6 people so 6x3= 18 and that is a 3 week ban for you my good friend ¯\_(ツ)_/¯ "
Naturally, the judgements enforced by the staff members are also subject to criticism as sometimes it can easily be perceived that sometimes they are just overreaching when it comes to what they ban people for.