1.5 overworld cropping ideas:
Everything should be fine other than kipz's branch mine which is at the edge of the red lines. If he didn't want it maybe cropped he would've built it somewhere more reasonable
Nether:
Everything should be fine other than the fact I have no clue where the molten portal goes to in the nether.
If there is anything that you want to keep outside of the red lines, let me know. If there is something near the red lines also let me know so I won't accidentally break something.