There's quite a bit of draft info available here
(1259.1) and here
(1442.1)I just changed my number of scouts to 3. Is the information that is shown based on having one scout up to now, and I may need to catch up toward the end of the season? Can I direct the scouts in any way, or do they simply reveal something about some of the 48 players?
The scouting is over for this season. What you invest now goes into your scouting for next season - what you see now is what you get. You can't direct your scouts, they find out information about the players randomly. Obviously, the more you invest, the more they find out about the 48 prospects over the course of a season.
Do the draft players have names, or is that something that happens later?
The players do have names, they are real players. They're just a bit shy at the moment. They'll tell you all about themselves when they join your team. There's also a big list of the entire draft for your league after the event, so you can see everyone and the order they were picked.
And does the draft happen all at once? Let's say I want to get a new power forward, so I move several prospects high on the list. If I snag one with my first pick, I might want to go with a pick for another position, so I would like to be able to rearrange my picks.
Yes, the draft is one big party that happens in one go. A live draft is something we, once upon a time, wanted to do and thought long and hard about it, but it seemed unfair to give an advantage to managers that could be online at the time. It also makes the whole system unnecessarily complicated.
If you do happen to pick 2 exceptional power forwards, you could either adjust your training to take advantage or sell them. Draft picks are a goldmine on the transfer list and easily "swapped" with someone who has what you need.