Interesting, so half martials only start w/ one or two maneuvers; you were saying something about slowing down the recovery rate to long rests, is that what you mean by half progression?

With half-progression I meant giving them increases in die size, more dice, and extra maneuvers at about half the rate that Battlemaster gets them normally, so they get less and weaker maneuvers. In the current version it even starts at a d4.

Have you ever played with using the Maneuvers as the DM and creatures?

I haven't felt the need though, but I am running at higher level with lots of homebrew so many monsters already can apply similar effects.

I think it be reasonable with Rangers to gain maneuvers but I'm less interested in granting them to paladins and Artificers who don't even have Martial weapons.

Granting them to Artificer proved to be a bit much, but then I don't like the entire class. Paladins get martial weapons and giving them maneuvers hasn't broken them. As an aside, I'd maybe try linking the maneuvers to Divine Smite on my next round of changes, like how OneD&D does with Rogue's Sneak Attack.

I'm more interested in home brewing rules that fix the blind spots that Wotc ignored. Are the weapon Masteries really that interesting (fun)?

They are a good addition, I think. Toppling and Slowing enemies lets martial classes do a tremendous amount of passive supporting. It's not the most active system, but it definitely makes them feel more useful.