My experience with IQue is one that I must say has been a mixed bag of frustration and joy. MediaSpan (NewsEdit) to their credit seem to have realized a bit late that InCopy simply does not have the support from Adobe that InDesign does. As a consequence Incopy lags in development...
One thing I have discovered however. MediaSpan over promises and under delivers. The sales team must sleep though the training classes because rarely do they know enough of the technical to get it right. The support staff tries to get it right, but I fear they spend their lives answering bozo questions or going to developers for answers.
Take a page from the get it right book.
Pick a site to be a primary test site that is a large site a medium site and a base site. Put developers on call to make adjustments to bugs on an emergency basis and I'll bet these bugs get squashed weekly. Probably help the customer service too!
BTW
Software that puts a minimum on its product should run at expected speeds. No delays... Gamers would flame and run hiding from your products if you did that to them what makes them think corporate users are any different. Stupid is as stupid does!