I really like this approach for 4e.
Well any of the attacks that are superior are costing a feat others are basically part of categories the classes are already given access to. In some sense we are declaring that in a campaign using these rules, martial types have familiarity with these weapon and armor types too AND non - martial classes have an aditional feat to become martial in front of them as well.Well, I don't REALLY have a problem with 'Martial Arts' requiring A feat. I mean, each new type of armor you want to wear, or weapon you want to wield, generally requires a feat. Here we're getting access to the whole shebang for one feat.
This seems like a very low bar, and if your martial and these are in fact MPs technically, then you don't pay a feat at all! I don't have a problem with THAT either, and clearly some classes should get a free entre. The Monk clearly should, being technically non-Martial and really wanting to have these.
Yeah, well, here's the conundrum. A feat is either a cost on reflavoring (you don't actually NEED whatever its giving you, it is just a lateral sort of flavor thing, do it different) OR its a feat tax (because it actually gives you something you NEED). Now, the 'feat tax' category is OK, as long as there's a BROAD list of feats you could choose next. There's also a third category of feats, which I would call 'plot enablement' which simply give your character an excuse for being able to make a check in some situation where maybe they wouldn't be able to or where they'd have to do things a different (and maybe less advantageous to their story goals) way. Of course a lot of those can turn out to be 'set dressing' (like language feats, the GM can always find some unintelligible foreign language for you to not understand if he wants). So we shouldn't look feats too closely in the mouth... lol.(isnt this feat cost to gain access in most campaigns like putting a cost on reflavoring??)
Yeah I have been giving the warlord class free entre in to having MP ... which would have made sense from the beginning if Martial Practices had been considered a martial function from the beginning.... and if I bring the monk into Martial (rather the way of the Berzerker and the Skald did for the bard and barbarian) I could give the monk some of the recent monk flavored martial practices too.
I am also thinking in terms of campaign flavor management, this might be seen as opening it up to a game where martial has more in common with Crouching Tiger Hidden Tiger than having one guy show up who fights with his hands.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.