I don't know (or don't remember) where the main Heroes of Might and Magic forum is. I'll write here so I don't forget.
1. It would be nice to change the hotkey for the splash attack when shooting Magogs and Liches (for example, to K or L). Since G is quite close to D, and personally, I often make frustrating misclicks because of this.
2. The effect of the Ring of Oblivion should work on the principle of the Shackles of War (plus - if the battle is with neutrals, pit lords are resurrected). Otherwise, when playing as Inferno, forgetting to remove this ring results in losing potential demons.
1) G is not much closer to D than W is.
2) And should neutral archers and wamp lords be resurrected? :D
Considering Jeb, I played it a lot in the previous version (1.3.3 if I'm not mistaken) and several times ran into a situation where I had a lot of different creatures respawning, but couldn't collect an adequate power stack due to the fact that they were different. And as a result, breaking into the T-area in W2 was very painful. The current Hota version has even greater variety of creatures, and I suspect players will run into such situations from time to time. The main disadvantage is that this fact isn't something easily scouted on map 111, so you won't know whether it's worth taking a restart or not. All IMHO, of course.