I truly hope that the miners vote against SegWit. Constantly increasing a system's complexity inevitably results in a number of variables and interrelationships that, in this particular case, haven't been fully captured yet.
It has been very thoroughly tested and in fact actually helps to simplify things (by getting rid of tx malleability). Please don't FUD.
Those supporting idiotic ideas like Bitcoin Unlimited might delay things but those with the majority of mining power can already see through the nonsense so I think it will get there (and kudos to the development team for sticking to 95% unlike those fork happy idiots like BU who are pushing to fork at 75%).