I like your suggestions a lot, but most of them don't address the list from the OP, from the faraway thread;
Needs interaction besides AC vs DAM *
Needs reach when in melee *
Needs area effect *
Needs Saves and/or methods similar to Evasion/Mettle
Needs 'action economy' *
Needs resistance/recovery from conditions
Needs attack and defense against magic *
Needs all these things to scale *
*these points are addressed by the class feat Stare Down
I'm for evasion or mettle being options, and it's in the list. I also have another Class Ability for resistance/recovery, but what i like about the Stare Down concept is that it gives the fighter so many of the things on the list.
When i tried to suggest ideas like yours, the brilliantgameologist laughed at me, and reminded me that a wizard can toast half an acre a dozen times a day. That's the kind of power i'm trying to stall with Stare Down. Stare Down hits multiple opponents in a radius up to 40' or more. Fighter currently has nothing like that. A fighter20 who somehow optimized Con and movement could be shootin' +40 against 20 targets up to 100' radius... . . I call that up to par with spellcasting.
My real question is: Is it broken? would it beat everybody that wasn't Wis oriented?
Are you looking to improve the Fighter Class, or make your Fighter a Wizard slayer?
A Fighter should never BE a Wizard and the notion that the Fighter should be "burning down acres of farmland" entirely undoes the class. At that point, just roll a Wizard and write Fighter down instead.
If the goal is to improve the Fighter's versatility, then my suggestion is where it's at.
Consider your criteria when held up against my "Sunder Mastery" suggestion.
Sunder mastery would satisfy Interactions besides AC vs. DAM, interacts with the action economy, and provides potential attack and defense against magic. In other words, forcing the Evil Wizard's staff to "Save or Die" can be incredibly potent when used correctly and could potentially improve as the player levels as the weapons/shields/armors they would be wrecking via save or die would become that much more powerful.... hence a greater debuff.
Further, there's no reason why your idea couldn't be incorporated into mine as a Fighter Trick....
Most of the things you suggested could become fighter tricks.
But if you're just looking for a Wizard by a different name, keep looking.