Timo,
I assume you're talking about the 'display_template' part.
This is a result of the way that list builder came about. I started development because I thought we had a client, but then it turned out that we did not. So there are features that didn't get implemented yet, and one of them is the ability to set these kinds of things in the ADP file. Check out the spec (the implementation ended up quite different, but the ideas are there):
http://www.collaboraid.biz/developer/list-builder-spec
I don't think that it's terribly bad in this particular situation. It's only one parameter, and you put in something which is explicitly ADP, and which is directly copied into the resulting page template by the rendering procedure.
What ACS 3 did was mix Tcl code with HTML code arbitrarily. This is very controlled, in contrast.
So patience, dear friend. As soon as we can find the money or excuse to fix it, we will :)
/Lars