I have been thinking about this army some more. I saw someone post elsewhere that the lack of the 4+ armor save makes this army not viable in 5th edition. I am really having a hard time with it. A possible counter is to put all your units in reserve but then the genestealers coukd infiltrate and spread across the opponent's long table edge... Seems like a dickhead manuever though. I'd love to hear other people's thoughts on this style of army. While it certainly comes across as a one trick pony I think there could possibly be more to it.