Things like ping, us removing doors/breakables, different starting and ending zones all make comparing offline times to tempus times not really a factor for us.
The main reason for the bigger map endings is to make it simpler and more predictable for people. Along with the fact that several of maps have very random / no end cap points, this was the simpler option for us.
If we were to zone it all trying to best match the cap points, it also brings up the issue of heights of zones. Do we just have the trigger cover 512 units above the cap point? Or to the roof? What about cap points that are raised/lowered or put in the middle of a massive box of water (whatever that map is). Personally I can see a ton of people getting pissed off when they finish a run and barely miss the end zone, by going too high or around it. So then complaints will come about make each slightly bigger until we end up where we started.
Personally I've only heard very few complaints about end zones, compared to separate solly/demo rankings (we are looking into this). I'd need to hear a lot more complaints before I dive into re-zoning the ends for 165+ maps.