Can't blame him especially this one. Ross being out weakens the doubles options and there's no 2nd singles. Unlike Federer who has Wawrinka for back up and still leaves him on his todd to take the flak if the Swiss lose.
Woulda liked to see him vulture Memphis' 500 points to keep him closer in touch with the top 2 personally.
I don't think he completely ruled out a tournament during February but Delray Beach and Memphis are the only two he'd go for being close to where he is. Although playing Delray Beach would leave him only 3 days between the 3 week period of Indian Wells and Miami.