It's pretty hard for me to get emotional about Massa. He had his chance, it didn't work out as hoped, he sucked after the accident. Good riddance.
Now putting Kimi in the other seat, I don't know about that. Ferrari needs to be strong and focused and hiring Kimi seems to be a move to piss off Alonso more than anything, hence the 1-year contract. I highly doubt it's possible to win a championship like that.
In the end, I don't prefer Alonso over Kimi or vice versa, as long as they win the WCC and perhaps even the WDC. Next year's definitely going to be interesting.