IW has been going for over 16 years and there are still members on here from 2004 or earlier
There is a big difference between how CPanel works to how IW works and IW does not place restrictions on sys admins.
The only important thing to remember is IW only supports their software and not third party software. So if you install a third party software and it causes an issue with IW software, then it is chargeable or you have to correct.
This though rarely happens as most do not change or add software.
IW are developing different themes as anyone who use IW can and a few have made similar comments. Personally, I like cool fresh as it clearer for me to read
There are ongoing developments which will be rolling out but no time frames