Correct. The idea is that you shouldn't be worrying about that. Include people whose judgement you trust. The vote should reflect trust relationships and not be manipulated directly. I kinda wanted the same thing (fine-grained control of voting) earlier in the thread but now I'm thinking that's not that important. We'll see how it works in the next round.
And will not such a system lead to a reduction of trust lists to 2-3 people, for whom (and only for whom) I would like to vote at some stage?
I don't know if it will. I'm not changing my trust list because of that. Someone with fewer votes might consider that but I think they would be doing themselves a disservice by not including people useful for their day-to-day forum usage (trust ratings etc) and focusing on the vote with a very low chance of putting someone they like into DT1. It's possible that some people will try to change their trust lists temporarily just before theymos recreates DT1. I think all these manipulations will have very little effect in the grand scheme of things but I have no data to support that opinion.