The thing about improving Rogue is that the roguelike genre has gotten so much better over the years that there's no point.
You're never gonna tweak Rogue until it's more tactical than Sil or has as much cool stuff as Nethack or is as overall excellent as Brogue. The reason for playing Rogue is because it's Rogue, you know? Not because it's the best roguelike but because of its historical importance, or so you can say you've beaten such an infamous game.
I don't think "better" is quite adequate, for they are in different categories. I play Rogue for kind of similar reasons I might play some Solitaire card game rather than playing Chess. Different game categories scratch different kind of itch and fit in different time-investment slots. Rogue, in its category, let's call it "coffee-break", I think is still one of the best.
So when I'm talking about improving Rogue, it's not about making it more complex, but more balanced. It's not about adding new stuff, but rather making what's already there more versatile, and in turn perhaps making it slightly more tactical.
Anyhow, I agree with the changes you suggested. Ultimately they all would make the game easier, but I think they would also make it more balanced, which is more important, or so I say. Look at those Solitaire games for example, again, the fact you can beat them relatively often doesn't take away from their replayability at all.