Are you aware of the configuration XML in C:\Documents and Settings\All Users\Application Data\Team MediaPortal\MediaPortal TV Server\AnalogCard? This allows you to specify some of the preferences that you might want to set by building a graph yourself. Of course it doesn't give you control of the muxers (these are required for the reasons that MisterD already explained) or TS writer connections, but it is better than nothing. Do you really think you need more than that?
I know about the xml config, the thing is in my case all that can be set there was already correct/optimal from the beginning.
As far as needing more: now that it works I don't need it anymore, but if you asked last week, then yes! I was just thinking out loud... :sorry:
EDIT: you may have misunderstood: the process I imagined would be to just set/select (e.g. in tvserver configuration) file with the graph, which one would build with graphedit/graphstudio. Not implementing those in tvserver configurator...