I think we should wait how SOE will implement the POI filtering. Depending on their solution it may make more sense to simply put "discovery XP" or something like that in the POI description (some have that already anyway, you can search for it) and hopefully the filtering will show only the search results.
Otherwise we may think of adding a new POI type, but the problem is that many discovery locs are also quest update locs and then you can discuss which is the correct type to choose (we already have this issue with Named mobs, some people now enter them as quest updates, which of course many of them are).
Drago I'll already note you as volunteer to update all the POIs one way or another.
We could use some POI mods anyway to weed out the many dupes or otherwise bad POIs.