Comment 2 for bug 1827710

The symbols value field is not used as the symbol library identifier. The name of the library symbol is used as the identifier. It just so happens that these are identical when a symbol is added to a schematic. The value field of the symbol in the schematic is private to the schematic and has no impact on the value of the library symbol. I'm not sure exactly what it is you are asking for but I can tell you that this behavior is not going to change because it would break every schematic ever create with KiCad.

Judging from your other bug reports, I suspect what you are asking for is an easy way to use a fully defined library symbol for frequently used symbols like resistors and capacitors. This can be done using symbol properties dialog and changing the library reference link to the desire symbol and then clicking the "Update Fields from Library..." button. I would be willing to consider a context menu shortcut for this operation. If that is an acceptable solution, then I will change the wish list request title. If not, this is a wont fix. Since this would be a new feature, it would not be released into the 5.1 branch and have to be released as part of v6.