Well I modified some general stuff like training efficiency, so early game is also affected. But I don't think it makes sense to restart the campaign.
EDIT:
Finally, version 1.8 has been released!
- Updated to the newest OXCE.
- New agent type: X-Com Shadowbat.
- New advanced agent type: Protean.
- 9 new events.
- New units: Black Sun Victor, Pinky Demon, Hell Baron, Dr. Alpha (all graphics mostly by Dioxine).
- New weapons: Quillbow (concept by Grit, sprites by Brain_322), BFG (graphics by Bloax), Stun Spear.
- New missions: UAC Moon Base Landing (in cooperation with Brain_322), The Island of Dr. Alpha.
- New Dossier: Dr. Alpha.
- New terrains: UAC Moon Lab, Dark Storm Mountain (collab with Brain_322).
- New maps for the Mummy Settlement.
- New items: Carapace Plate, Zephyr Serum (concept by Grit, script by Meridian).
- New Juggernaut sprites (by Wolverin).
- Improved Pancor Jackhammer sprite (by Brain_322).
- Improved handobs for the M-16, Plasma Rifle, Laser Rifle and Turbolaser Sniper Rifle (by Brain_322).
- New Animal Pen sprite (by Brain_322).
- New article: Alien Colonies.
- Rebuilt alien embassies into alien colonies (easier to get in, but can't reclaim the country).
- Removed some Hybrid/ADVENT missions as they no longer fit the concept.
- Aliens can now react in multiple ways to shooting down UFOs.
- Medium zombie infestations are slightly more common.
- Tweaked crashed UFO mission chances.
- Decreased number of enemies on low difficulties.
- Changed Coven's reward to Protean tech.
- Smaller maps for Hell Cruise with Dr. Hadriex and Osiron Cruise Liner.
- Smaller maps on smallest monster hunts.
- Water pools slow you down.
- Incendiary weapons damage TUs (reaction shots are less likely).
- Rifles rebalance.
- Decreased the Reactions balance for the BlackOps Auto-Sniper Rifle.
- Lessened the penalty on Smart Shotgun for 1-handed shooting.
- Napalm Grenade can now be examined if you find one, but its manufacturing restrictions remain unchanged.
- Improved terrain damage on both cutters.
- G11 is now a revived weapon.
- Modified Synthmuscles tech tree and you can now get them from Osiron crates.
- Removed inventory from dogs and rats.
- Added abort penalties on some missions.
- Changed some mission despawn penalties.
- The Weapon Self Destruction option is no longer locked (feel free to suffer if you like).
- Animal training no longer yields monster teeth.
- Interrogating units which you can extract armor from now also gives you their armor.
- Training caps increased.
- Added Black Sun Stormtrooper descriptions.
- Added Spitter armor variants.
- Linked rank-related armor variants to Ufopaedia articles.
- Better Congo and Senegal flags (by Kato).
- Fixed Floater's grav device color (thanks The Martian).
- Swapped BlackOps LMG and BlackOps Assault LMG sprites.
- Syndicate Monster Lab graphic improvements (by Brain_322).
- Fixed some inconsistencies between weapon types and commendations.
- Fixed training speed.
- Fixed a bug where you could build multiple Advanced HQs.
- Fixed an inconsistency in corpse recovery between X-Com Cyberdisc and Alien Laser Turret.
- Fixed Flying Suit production being too easy.
- Added missing extra effects on alien turrets and Sectopods.
- Fixed MiB Strikeship map.
- Fixed some Ufopedia entries.
- Minor fixes (many thanks to Emil J. Schroeder for tracking down literally dozens of small issues!).
Remember to update your OXCE!