In LLD Overrides ite will be nice to
1- Have more field to filter, not just de Name, because the name will be seen while monitoring
2- Ability to change some other fields for a discovered item (maybe the type of data)

In my case, a discovery could discover several items, so, the settings will be no to discover in the item prototype and write an override, where it can be filtered.
Some items will be numeric and others chars, as I can not change de data type in the override, is necesary to write one item prototype per data type, and put some string in the name of the item (in order to identfy the data type) to just discover the item of certain data type.
Also I do not understand why the key of the item prototype should by unique, since it does not guaratie that the discovered item will have a unique key.