As for the changelog, here it is:
Graphical Changes:
- Iron mine icon is now blue
Text Changes:
- The CD-Player now once again says "Track" before the track number
General Fixes:
- Townhall can no longer be built on trees and other objects
- Vechicles workshop can no longer be built on trees and other objects
AI Fixes:
- The AI will now attack in The Peasants Rebellion campaign as supposed
- The brown AI player in mission 6 TPR now handles axe fighters correctly
- Green player defense radius in mission 15 TSK improved, sneaking no longer works
- Southern gray player will now defend the northern tower in mission 15 TSK
Mission Fixes:
- One enemy farm that did not previously appear is now visible in mission 12 TSK
- Two enemy gold mines and one enemy armory workshop that did not previously appear are now visible in mission 15 TSK
(This is not merely a cosmetic fix, if you ever wondered why mission 15 TSK was so easy, it's because the team runs out of gold :shock:)
- (Not done) Check what's causing the enemy to run out of food in mission 9 TSK and fix it
- A lot of misplaced and missing roads have been fixed
Text Fixes:
- Message sent at start of mission 3 TPR has been corrected (English)
- Mission 6 TSK briefing text fixed (English)
- Mission 8 TSK briefing text fixed (English)
- Grammatical and typographical errors in several messages and briefings fixed (English)
- Dispatch troop erroneous hotkey description changed to D (English)
- Link up troops erroneous hotkey description changed to L (English)
- Separate troop erroneous hotkey description changed to S (English)
- Eventual text errors found in other language versions of the game...
Some of you probably realize but ELP4 was originally created solely for this patch. This is why the text fixes lists the changes that were done in ELP4. Because the patch was put on hold, the decision was made to release ELP4 separately.
Granted, the fixes in this patch are nothing close to as major as to make the old players take the game out of the cupboard and start playing again but it's something

One major reason why I wanted to create a SR3 in the first place was to make sure quite major text fixes would find their way onto as many players computers as possible. The other fixes were just done as a "bonus" you could say.
But is there any interest for something like this whatsoever? And I left it at the stage where it was something like 95% complete, so no, finishing it would not mean a lot of extra work.