I think even the ACS4Tcl templating system is cumbersome and would be better scrapped for straight Tcl. There's a lot more presentation logic in any page than HTML, which to achieve with the ACS' not-nearly-XML syntax is a pain!
Tcl has to be one of the simplest scripting languages available. I don't think the addition of <angle brackets> makes it any easier for designers or any one else.
Thank you...