Right now adding vendors to ITBs is painstakingly slow. One code at a time? Should be able to drill down to the minor level on all your contacts and select multiple classification codes to choose from your contacts to invite.
Reduce the number of steps to select vendors / subs. Why Actions button /Add vendors. Think simple...Button for Add vendors. Too much hunting around for tasks. Be able to choose your default settings all that page settings...not each time you go in there...or generally remember where you were last would help.
Also the columns for the ITB vendors list...again sorted by classification code is imperative.