I'm no server creator, but can't you already do most of these? It's possible to start with a kit without a command, also you can already protect/claim land. Though I'm not sure about permissions, but I think so.
Love the idea of more server-friendly commands! Would love an easier way to make ranks for /permissions to work better (e.g. /permissions allow [Rank] [permission]). Maybe a rank option for scoreboard. I don't know but definitely love the idea.
Well trollsack you can make a kit "button" with command blocks but to make it work you have to use /give (@p) and @p is not very efficient becuase if someone is standing closer to the command block then the person pushing the button then they don't get what they need.
Yea i know its with bukket but some people don't want to deal with bukket (me) and vanilla servers need some more commands from bukket plugins but not all of them just the necessities to manage your server.
Yea well you can make /scoreboard teams as ranks if /scoreboard teams option permissions is implemented and you can also color the teams with /scoreboard teams option color and then the color so you can see what rank you friend is on or whatever