I hope they put those game modes back in as well. I think though the original CS team isn't working on CS: Source (maybe CS2? *cross fingers*) since I doubt they would have their mod butchered up like that if it was up to them.
I for one liked the AS_ game mode better when the VIP only had a knife. Getting a kill with a VIP then would be proving REAL skill, heh. Ah, the good old days of as_tundra..
As for the ES_ they stopped supporting that since it was unpopular, no? I played since beta 2 and I totally missed out on the ES_ maps until I became a server admin in 1.1 .. they were just that unpopular.