Why I won't move my companies to Em Client

I’ve used Em Client at home for a while, and while I like it, it has has two big holes that prevent my adopting it at work and as the standard in my companies: 1) although it appears to have been requested for years, you STILL won’t give us the option to select which message gets opened after a delete. Yeah, I know I can sort it, but that’s not how I work, and I’m not going to change just because your developers are too lazy to offer this simple option. 2) There is no support for multiple windows. I need to see my calendar when I’m reading and responding to emails, and bouncing back and forth is not an option. Likewise with contacts.