Disagree. The current machine is great and will sell well regardless. The MBP is not a huge income earner for Apple (unlike iPhone/iPad/App Store). I think it will be more like Q2 (i.e. WWDC). Better to wait till then and get it perfect. It's a very important machine to the developer community, nevermind that it only accounts for a tiny slice of Apple's profits.
Don't forget we'll also Kaby Lake in 2016, albeit towards the end of the year. That's why it makes sense for apple to release skylake as early as possible as there will be another release at the end of the year.