I'm an ex-Traktor user. Took the plunge when I bought a DDJ-RZ.
1 - don't think there's any way around this as all tracks needs to be analysed before you can play them. But - analysing doesn't take long. I could drag a song from the harddisk/network into a (temporary) playlist and usually within seconds it's been analysed and is available for me to drag into a deck.
2 - I do this all the time. In fact, it's how I made the switch - I dragged whole folders into Rekordbox. Including genre folders (eg Trance) which had many sub folders - all the tracks withtin the folder got added to my library.