The end gateway is a wonderful building block thanks to its completely different appearance and lack of depth perseption compared to other blocks. This is an example of what they can do: http://prntscr.com/l9n8xd However, they emit these strange purple beams every once in a while, and it makes them far less useful. Heres a screenshot of what I mean: http://prntscr.com/l9n95u If there was a custom plugin made to remove that beam effect, they would be perhaps the most unique block to use in the entire game. It shouldn't be too difficult either, as they appear to have a timer between the emitions of beams, Just figuring out how to lock that timer at a non-beam state, would fix this issue.
I'm on board with the idea, it's great to bring such better ideas to help us build, I've also run into this issue!