1 sounds nice

and 2:
- sounds also nice
- should be possible to import own "map-shots"
- replay should work for that, too
- perhaps numbered icons, so you know who is where or multiple options like (team) colored points, icons or names
- and should be quickly switch off able server side, for clanwars, since it could be suspected of beeing a cheat, as you could warn your teammates over bc before an enemy attacks.
- another thing are multi layered maps like ie course where multiple levels lie below each other. could be managed by making upper ones bigger or making multiple "maps-shots", but here again you could loose overview, so you should be able to switch between each other, or you make everything flatten, but then that information would be lost :|

but you should also look how much bandwidth it takes to transfer the player-positions