@john_percywhat you mean by "adding 54 POIs to Locus"? Just ordinary points from own database? If not, how to simulate this slowdown caused by points? 54 points should really have absolutely no impact on performance, weird.
Why do you think that scale x2 is not correct? Simply check scale line on the bottom of the map to confirm that distance factor really scale x2.
@michaelbechtoldscaling of maps may be a problem because I do not expect, other apps will do the same as Locus Map now do.
Look on this please from the overview: display any common online map (like OSM classic) and any vector map in older Locus Map version and do the same in current Beta version. You will see the difference.
With higher DPI of your device, online (generally any raster) map are more and more useless (the difference between vector map and raster map is bigger). In the beta version, these raster maps should give the same resolution of texts, symbols etc. as vector maps.
You created these world maps some time ago and they itself are scaled a little bit to solve the problem with non-scaled raster maps on its own. Am I right? And this is the problem. If you do world maps with the same scale as are all other raster maps (also Google Maps and other online web maps), this won't be a problem.
Anyway possible solutions:
a) every map may have own parameter in the app UI to set custom scale > something I would like to avoid as it may not be needed. Also, it will need extra work on the users side to optimize it.
b) custom parameter that may be defined directly in SQLite/MBT map that allows telling Locus Map "hey, this map should be scaled little bit different". It will anyway need to modify map itself, so users will need to download a new version.
Is version b) usable for you?
@slarti76texts are drawn on the tile so yes, the mentioned topic is a problem because of this. In latest MapsForge versions are some attempts to render texts separately, but how exactly it works and mainly if this may be used by maps like Locus Map: do not know yet. Anyway, texts are still drawn directly into the tile. What you see is a small alpha effect I made, that just do small interpolation during drawing between old and new map tile.
"Increase map resolution" should have the same effect on both raster and vector maps. You see a difference there? Weird. Maybe raster maps look sooner little blurred. It is as I wrote to Michael before. Raster maps itself are already little scaled by device DPI.
(Also to John's post): it is correct that the visible area remains the same. Usage of this feature is to see bigger content in the same area. So rescale maps by 200% result in using lower zoom level scale to 200% (to keep same visible area).
Anyway as I see, John is correct that result is ok for raster maps, but not exact for vector maps. Most probably because the road in lower zoom level X is thinner than in next zoom level Y, so "road width X times 200%" is not same as expected "road width Y times 200%". Hmm, an alternative solution should be using still the same zoom level rescaled by X% and display a smaller area
...
Clickable POIs are a little funny. I noticed this also a few days ago. It is not my intent, it is more a side effect that happens if you enable LoMaps and then any other map. Anyway, I found it really useful so maybe we may consider adding LoPoins into side menu > layers and allow to enable/disable them independent on LoMaps? Hmm ...
Exclude certain maps from "quick map switch" ... the ideal candidate for voting? (mainly because it's not a 5-minute task)
The scale below 50% ... there are two features we may talk about
a) "increase map resolution" that may allow setting value below 100% (as suggested by @michaelbechtold)
b) and "zoom lock" after which you may scale below 50%
I personally think that a) should not be needed as all maps should be correctly optimized to 100% scale now. But I may be convinced to 75% if there really be an interest

. But still ... I see quite well on a short distance and with the resolution set to 100% (so this option disabled), I sometimes have real problems in the terrain to read something on the map. Big difference compares to the sofa.
b) slowness, possible crashes with scale 10%? Locus Map is quilty, definitely not the user. So consider this as small "Locus Map good name protection".
Just a few days ago I also had a small weird feeling from this which map to which theme etc. So Michal (from our team) already has on table idea for a blog post related to vector maps & it's themes.
@zossebartyes please. If any WMS does now work correctly (please check if any change in defined CRS has an effect), provide me Url to test.
Uff, sorry for the long post ...