This post will be me trying to debug the save issue. Hop along with any suggestions you may have, I could use any help.
Questions before we begin, for you guys. (I'll probably update with more later)
1) Was the game crashing on loading save in Version 6?
My possible theories on the save issue:
1) As Spatz pointed out in another thread I posted
here, the save issue may be tied to the game failing to reinitialize the UI, which would point to an LUA error.
2) As Pazyryk pointed out in the same thread, it may also be an ID issue.
How the test is going (if you're curious):
1) With Putmalk's Ancient World (V7) enabled only, I load up a game and save on turn 0. Load the game up.
Result: Crash
2) I now disable VictoryProgress.lua. Try the same process.
Result: Crash
3) Re-enabled VictoryProgress.lua, it is not the problem.
4) Repeat steps with AssignStartingPlots.lua.
Result: Crash
5) Re-enabled AssingStartingPlots.lua, it is not the problem.
6) Imported lemmy101's
Deletion Fix into the mod.
7) Repeat steps with new SQL file.
Result: Crash
8) Well the obvious is out of the way. Now we get creative.
9) Load up a vanilla game, save and load.
Result: No Crash. (expected result)
10) Removed "AffectSavedGames" flag from mod. Save and load.
Result: Crash
11) Scale back to version 6 hotfix.
Result: No Crash Okay, now I'm happy. This is huge. Thank God I catalogue all of my releases so I can do things like this.

12) Painstakingly view all Version 7 changes to see what the problem is.
It's gonna be a long day. >.<