Long time lurker here. I finally have solid good news on my iV Tech Estate with no extras. Company lease ordered Oct/Nov 21. First real update was a couple of months ago with "estimated build date mid-aug, for Sept delivery". Today received news that it is on its way, so the current updates do seem to have some accuracy, and things are starting to move again on the iV front.
I can't comment on the exact value of iV to your particular situation, but on the bright-side; you hopefully paid far less for more car than anyone is able to buy today. Also, I suspect that because the iV's were removed from sale, despite being popular, that this will create a strong 2nd hand market for them. So hopefully you still have a decent car for the money, and you can still get quite a lot of value back if you don't get on with it and want to sell it on.
I know what you mean, the excitement does die over certain periods when you are trying not to get your hopes up, but I bet when it is due for delivery you will be excited again. I know I am looking forward to stepping in to a new car again now.