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.
Sorry, but that's silly. The principle of SegWit isn't that complex. Compared to various altcoins like Ethereum or ZCash it's much easier to understand and maintain. It's an ingenious solution to make storage use of the blockchain more efficient. In addition it's a security improvement by fixing transaction malleability.
SegWit was thoroughly tested by various experts over many months. The FUD stories of Roger Ver and his propaganda trolls is entirely unwarranted - in fact the true threat are excessive blocksize increases which would destroy network decentralization.