When adding playlist entries from a collection folder via the Files panel, take it from the Collection

Use case:
I like ordering my music on the file system, e.g. I put new additions to my library into a "New" folder aso. All those folders like "New" are also in my collection (Exaile db).
This gives me the possibility to have different views on my library. I can either access them through the Collection tab (or the dynamic playlist) or on the other hand via the Files tab by the subjective categories I applied via putting stuff into different folders. I love that Exaile gives me that flexibility (and that's why I came to Exaile in the first place).

Here comes the problem:
When I add playlist entries from one of those folders that are in the collection form the Files panel, the Files panel does faithfully what it always does and scans the meta info and adds it as an out-of-collection entry. This of course excludes the use of things that are based on additional meta data that is only in the collection like the rating-facility or play-count.

My take on making up a solution:
So couldn't it be done so that if a playlist entry is added from the Files panel that it is checked if it actually exists in the collection and take the reference form the collection instead. This check would only be performed for entries that are under one of the folders that make up the collection.
I (wildly) guess that there should not be a performance hit, as the additional time needed to check for existence of the file in the collection would be compensated by not having to parse the file for meta data. The only situation when the loading from Files panel would get slower is when the file is inside a folder that belongs to the collection, but the file itself not in the collection. Hence when the collection is out of sync with the file system, and that is anyway an exceptional state, isn't it? In that case the loading could fall back to the standard file loading.

Please correct me when I'm wrong about my assumptions.

I'm running exaile 0.3.1+ from bzr on Ubuntu Jaunty.