There we go:

I started by exploring the build your own section as I see myself as a person who knows enough about overclocking and undervolting. I didn't explore it thoroughly for now, Also I didn't test other things but this is a start. The first thing that strikes me was: I wanted to select in use frequencies all at once, so as a check list and then later all my selected frequencies would pop-up and I chose the desired voltage. This is the way I expected it to be as IMO this is more convenient than select frequency voltage and dsp and then go back to the first menu and start over again with the next frequency. In my opiniun it would be easier to ask:

What frquencies should used?
Checklist, with all frequencies and you can check multiple
( )125
(x)250
(x)500
( )550
( )600
( )700
(x)750
( )805
( )850
(x)900
( )1000
( )1100
( )1150

Next dialog:
All selected frequencies popup for asking the voltage so in this example
What voltage should be used for 250MHz
30
What voltage should be used for 500MHz
36
What voltage should be used for 750MHz
40
What voltage should be used for 900MHz
50

Next thing dsp rate: same as previous
What dsprate should be used for 250MHz
360
...
...
What dsprate should be used for 900MHz
600

Then next dialog:
Select SR
( )VDD1
(x)VDD2

Next dialog
Choose sampling rate
nice slider like you already have

Next dialog
Enable powersave bias
yes or no

Next dialog
Choose up threshold
Nice slide like you already have

Next dialog
Ignore nice load
yes or no

=========================
Hope you get the idea On every dialog there should be a next button instead that next is in the list, thats quite confusing for newer users I know my way round but I think the way I just presented is much more systematic and consistent than now and ofcourse easier to understand.

Now I get some sleep and you will hear from me another time

almost forgot to say: A bug: 125Mhz is always included, as it isn't on the list you can't select voltage or ignore it but when you look at the actual config file it's not on avoided frequencies