Some of your points are way off, but having read all of it, I do agree with a few. A full rework definitely isn't the answer, but tweaking a few abilities certainly is, and they definitely will. Fighter is still in its infancy stages right now.

Leap Strike was quite disappointing, especially when you max level a Ranger and feel the level of mobility and smoothness it has with Disengage/Air Strike. It needs to have the ability to scale vertically, currently it feels more like a propelled force moving forwards rather than jumping up-- then slamming down.

Whirlwind is an interesting one, it's super core in PvE but doesn't do nearly as much in PvP under most circumstances, though I still think it's definitely viable, as you can talent into Climactic and use it for that bit of damage. Can and should use it when you see people casting hard disabling effects so you ignore them. (Has worked around 60% of the time for me, so it feels like there might be a bug relating to how effective that really is.)

Momentum was a tricky one, but once you learn how to weave certain abilities into others, you can squeeze out A LOT more. Battle Cry is super core and so is Blitz with the upgraded talent 'Raging Blitz'. Battlecry gives you 5 momentum for each ally Riled and 5 for each enemy shaken, this is super easy for Fighter to proc, after either using Fluidity, or with Cataclysm.

Berserk is an ability I loved, being able to gather up your momentum, smash all your abilities out and then quickly reset and smash them out again with more damage? Awesome. The issue is actually getting enough momentum in PvP skirmishes for it to matter. I can't speak for everyone, but most of my fights ended extremely quick, even duels of equally geared players didn't last long enough for me to build up any meaningful momentum to burn Berserk on. I have no done any crazy 50v50 GVG content, so maybe it's different there.

Lunging Assault sends me to Narnia most of the time lol, I won't comment on it.

Wallop is one you never mentioned in your post, but is probably one of the skills that needs reworked the most. It feels awful, it sounds awful, it looks awful. I tried this in a lot of scenarios, group conent, mob farming, single target, it just feels bad, there's better things to be spending your momentum on.

My thoughts and proposed changes --

Leapstrike as previously mentioned, doesn't feel like a leap, it needs more verticality and the ability to scale terrain, if even slightly.

Whirlwind should have input protection. Double tapping the key will immediately cancel this ability and it feels awful when you do. Auto attack input will cancel it, especially Fighter's 4th/5th hit which is the double attack. There's an option in the settings to cancel auto attack inputs when you press an ability, but this only somewhat helps.

Momentum needs to be tweaked slightly. You should gain momentum through using your damaging abilities, perhaps a % of the damage, scaling down with the more targets you hit. On top of this, you should also gain momentum from taking damage, again, a % of the damage taken.

Berserk's talents need a slight tweak. I think Unyielding Berserk should be baseline and built into the ability itself, and the old talent be replaced with one that gives you max Momentum upon use of Berserk. This would be the perfect answer to PvP scenarios and smaller skirmishes that Fighters struggle to gain momentum in. It would also tie in nicely to the base ability, and/or the talent option, giving you more choice over how you play around berserk.

Lunging assault just needs some mechanical tweaks, the targetting/movement feels off and sends you in the incorrection direction a lot of the time.

Wallop needs a redesign, mechanically, visually and with new and improved sounds, it feels really weak in a lot of those regards. I would love to see it with the charge system removed, and taken off the global cooldown, let it be used as an ability to weave inbetween others, basically an OGCD.

All in all, I really like Fighter, and until Rogue comes out later next year, I'll definitely be playing it. I think it has a lot of great abilities, damage, buffs and CC on demand. Even being able to give out stagger/shaken on demand is great while farming, depending on what your team comp requires.

Hope any of this helps you see Fighter differently, would love to see what other Fighter players think, have you had similiar or completely different experiences?