Probably already solved / answered, but the trees in the first post are not MSFS default trees, but those from Photogrammetry data streamed by BING. They do not look that great, unfortunately, especially when PG data is still not rendered completely.
But even when PG is loaded in completely they look blocky from close up.
Only “workarounds” I can think of would be a) accept it or b) turn off Photogrammetry in the Data options. Then you should have same default trees as everywhere. Of course then also the houses, roads, arial maps will return to default arial view data with AI buildings.
So at the moment there is a trade off. Maybe at some point they can exlude those trees and replace with default ones, but I assume that´s not that easy to do.