I go to Contacts when I want ALL the info I have on a person.
When I'm in Google Maps and search contacts, it shows me Addresses only.
When I'm in Mail and I search contacts it shows me e-mail address only.
When I'm in SMS it shows phone numbers only.
This is nice. This is clutter-free. This is how it should be. I don't WANT to see everything in all those situations. It's nice to have those sections cut out what I don't want and leave all the info to the main Contact app. That's what the Contact app is for. It's got everything.
There is, however, one problem here. And that is the Phone app. Unlike these other apps, it DOES show everything, just like Contacts does. You're right! This is strange, and it should be changed!
So you're right, there is a problem. But you've got the solution wrong. It's not the 'Contacts' app that's the problem. It's the fact that the Phone app contains e-mail addresses and addresses. They should take those out of there and just list phone numbers in the phone app.
So, yes, there's a problem. But your solution is backwards.