Re: "makes the dictionary easier to use and interpret"; I'm not sure having the --に version of a な adjective entry is any problem at all when it comes to use. That said, this one is a bit odd as our 切実 entry has two senses and this has them rolled together. It probably should be aligned, but I agree it could equally well go.

I disagree - I think there's a value in being consistent, it makes the dictionary easier to use and interpret. It requires no big effort to remove them.

We probably wouldn't add them now, and I wouldn't suggest 切実さ which is also in GG5, but there's no reason to cull them. They're not exactly wasting paper.

We used to sometimes include very plain and simple adj-na+に before based on them being in GG5, but I don't think we should and that we should get rid of the ones we have. GG5 has basically all common adj-na as "...に" as well, but I don't think we want to copy that.