Disconnecting archery from slinger is, IMO, one of the things necessary for this game. I practice traditional archery (recurves and longbows without sights), and I can tell you that the muscle groups used are VERY different from those used to throw things. Also, crossbows should be their own skill. Most of the rest of the combat skills I don't have an issue with, except for maybe some of the armors. Regular padded armors should be available to every skillset across the board, as the gambeson was generally the single most common type of armor found on any soldier from this time period, from archers to spearmen to some lower-class nobles.
The melee weapon skills should be disconnected as well. Nobody learns to use axes before swords, swords before maces, etc. In reality, the axe is a more complex weapon to use than either the mace or the sword.
Given, I do believe armors should be restricted. I grew extremely tired of seeing full-plate archers in YO.