Not sure if the phone will voice dial call 911.  Have you tried a voice dial?  Can just tell the operator who picks up you were testing the voice calling capabilities of your new phone in the case of an emergency.  I know 4S users have said that SIRI will NOT call 911.  She responds to your request with, "I am sorry I can not do that."  or something.
Nice thing that iOS does is to bring up the phone in the last used config.  So if I use the keypad to make a call, next time I enter the phone app, the keypad will be up.  If I use recent to make a call, the recent list will be up next time.  Very simple to implement I would think.
ICE should not need to be in the dialer every time you enter the phone app.  I have used 911 maybe 5 times in the last 20 years.  If you are someone who has a job that requires frequent use, I think the tile option would be what you want.  No reason for the other 99.999% of us to have the ICE contacts icon in our dialer every time we open the phone.  Just increases the chance of miss dial.