Old maps, high population meta events
I understand where you’re coming from, with players being split over more maps, but I wouldn’t worry too much. Personally I’ve never not seen a a Silverwastes listed in the LFG (on EU), I play at all kinds of different hours/times of day and there’s always maps on there, often permanent RIBA ones too. Granted Dry Top not as many, but still normally I see one or two listed during off peak times.
With HoT maps I’m sure we’ll still see the same, there are always going to be a lot of players going back to them either because like me they still enjoy the maps and metas, or because they are still going at map completion, HPs, rewards or achieves etc. Don’t forget even some people who have had HoT for ages will still have lots to do there, as there are a lot who may not have had time, or just play at a different pace. Plus I would assume there will be a lot of new HoT players who will arrive having purchased the expansion bundle. So I think the numbers will still be good across HoT for a long while yet.
In addition I’m sure Anet will have already got these things in mind, and will no doubt scale things if they see numbers dropping in maps etc
I agree that it is not an immediate issue, but, I fear it will become one down the road. Even now, T6 on Dry Top is very uncommon, and it feels like the Verdant Brink meta has a very low success rate.
I have spent some time this last week repeating older content like LS2 and HoT on different alts. And sure, the Drytop/Silverwastes has no meta going on anymore. There are some people doing quests but nowhere enough to take out final champs.
There are also no people doing Verdant Brink anymore. Again, there are some people on the map doing map completion and HPs, and some events when they run around, but nothing about organising map-wide groups to take out final bosses.
Now, Auric Basin is different. there are more players around, and I have seen commander tags. I also did successful attack on Tarir from 4 sides well under time limit just yesterday.
Thing is, with new big PoF maps, there will be less players left on HoT maps. Even worse, there will be no experienced players left on HoT maps, and that is important, because these events require at least someone who knows what to do. Sure, there will be players on HoT maps even after PoF release, but these will be players who still need to learn the map mechanics. And learning while you have not enough people, is very difficult.