If I was just changing a destination I would do that thru the EMML in the olden days of Shift-F5 I think it was that would let me enter the AMO directly and use DEST. I actually spent a week in training in '96 for the EMML stuff, which included how to use Shift-F5 to access the AMOs, so when DAD came out I was ready to go. I was happy because I was one of the last holdouts for going to Windows - I wanted to hang on to my command line as long as possible and I hate menus. To this day I still do a few things in cmd.exe in Windows. I did use %CHASTN, and then they came out with the first version of 6.5 and took it away I was pissed - for a while there it was really hard to do some of the stuff.
LC-Win is a tool that is nice to work with in v4.0 where they finally got the functionality pretty useful, but like all tools, one size doesn't fit all, and I still spend a lot of time in DAD. Taking the check mark out of "In Service", hitting OK, then going back and putting it back in and hitting OK again is not the same as DEA-DSSU and ACT-DSSU when a station is in DEFIL, and you can't even tell that's the case without SDSU. Plus LC-Win will not allow some of the basic changes to a station in a hunt group, and it whines, where all you do is drop into DAD and run the command and it works just fine...
The other thing that sucks is still needing to use ProComm to get into unix so you can check your backup status or run backups. I have Comwin that comes with the 4000 and the techs all use that to get into 9006 instead of ProComm, but I haven't mastered the trick of getting it to connect yet. Also in 6.6 there are some new web-based tools you can use by hitting the IP of the switch if it's on the LAN, but the backup in there does not report the results of the regular unix backup so you're still kind of stuck with UBA for now.
The 4000 has it all pretty well put together. I like to use the assistant for a Lot of it, but when I create new stations and add call forwarding and a few other things I do it all in Expert Mode (Direct AMO). You can write macros to to a whole lot of stuff, and it really speeds it up. if I'm adding a department with 20 of the same type of phone I can take one line of code, copy it 20 times, change the extensions and PEN numbers, hit run and *poof* there are my 20 stations. If you save that for the next time it goes even faster. I have similar scripts for adding call forwarding, names, and other repetitive functions. Then when I have them all created I go into Assistant and tweak them the way I want. Plus there is one common interface for everything, and I don't have to try to teach my backup techs 3 different flavors of LC-Win, plus ProComm!