While the major update (released a week prior) introduced massive item rebalances and "G-Fuel" synergies, v1.7.9a was a hotfix specifically designed to address stability and minor bugs introduced by that larger patch.
4 Nov 2022 — Buffs specifically to the Worst 10 0-Quality Items: * Breath of Life now takes less time to activate and recharge. Upon blocking d... Reddit·r/bindingofisaac All Item NERFS in Repentance Patch 1.7.9! While the major update (released a week prior)
4 Nov 2022 — The Binding of Isaac: Rebirth - Repentance Update 1.7. 9 Changelog and G-G-G-Fuel!!! - Steam News. Home Discovery Queue Wishlist P... While the major update (released a week prior)