They are all short, easy to access, and provide a path straight to the backline if you time it properly. There’s also like 20 alternative paths to get to each flank route, providing a secondary option to get the jump on someone already using said flank route.
That’s a subjective opinion.
No, this was actually the one map that allowed Reaper to flank. This is because it’s one of the only maps that doesn’t require him to burn his mobility just getting into position and every corner is conveniently close enough to do effective damage with.
The only part of the map Reaper’s tank busting capabilities were useful was at the first choke and the second choke. That’s also only if the tank overextended too early.