+1 to clarifying the DELAYED queue section. Please also include an example dcut command on how to remove a package from the DELAYED queue if the maintainer does not want to have it.
Personally I would much rather see a contribution being submitted to my packages as a Merge Request on Salsa, than as a NMU via DELAYED. If I am active, I can immediately engage in discussion about the change. If I am really busy I can just merge it without discussion, or comment that I am fine with it but don't have time to review deeper. If I am completely missing, I would be fine if somebody posted a MR and then after a few weeks went and merged it themselves and uploaded. This would still feel more collaborative than noticing a new package version as NMU in DELAYED. Does this resonate with others?
