I'm going out on a limb here, but I am a fan of both these guys.
Kyrgios is a bit of a douche, but he's just so good to watch, he's one of those guys with the X-factor you can watch for hours. Yeah he's a bit much, but he's young and he'll mature.
Tomic is a little different. He was the guy, then when the bigger better deal comes along he gets tossed aside. I feel his comments about Tennis Australia are spot on. Rafter is a mask, you can't criticise him because he's an Aussie legend, but what's his job? He's also a real talent and is now getting a ranking to reflect this.
With these two guys in the squad the Davis Cup team can actually do something. Without them it's terrible.