There will be a major update to the layout, theme and coding of our software coming out around the first of the year. I do not have any dates, so please don't ask.
I cannot provide any screenshots, but I can say that you will be able to create your own themes which will allow a lot more customization that what you can currently do.
Currently the asp.net code TCAdmin relies on is a bit heavy. This will also be changed to a lighter code type to allow faster loading times for most of the screens.
I can say that I understand your concerns regarding the current layout. I am confused as to why customers care since we have many unique features. But we have listened to you (even if we don't publically respond) and your complaints.
I guess the younger crowd is more into what the software looks like, vs. what it can do?...
If you feel like there is a better alternative that you can move to, then as a business person I would say go with what you think is your best option.