Think we will not reach an agreement on these points :)
you should always check the data if you want realism
Yes, simulation means realism to a certain extend.
Having the latest navdata in sim is very realistic of course...but it is not needed for flying/training an ILS, VOR or other approach.
I don't have any subscription for navigraph or fsAerodata or any charts, because the sim is always lagging behind and we have to update manually. (fsAerodata is great, but not compatible with Aivlasoft's EFB2, so I don't use it)
From time to time I'm buying a new cycle and then try to update the sim navaids and install this cycle into all my addons...and I can stay there for years.
But that's my procedure and not yours, I understand that :)
nonexistent must to be remove, is not discussed...
Unfortunately P3DV5 still is in the year 2017 regarding navaids and it will stay there for now...
Of course you can try to find out every single discrepancy and post it here, but this will be an endless fight and I don't know if it is really worth it.
The whole world of sims is trying to use only the latest nav data and it's silly to argue with this and ask to leave the old data...
I would rather leave it at a specific cycle than to mix it up...the only practible way is to have a navaid-database, which we can easily get updates for.
Let's hope we will get something like this in the future and then I will also subscribe to have access to the Navigraph-charts again :)