The next step is to be added on bitcoin, so looks like segwit haters will not become believers until they see it live in bitcoin, but block at the same time. Decide.
It's not that segwit can't "work" or that things will blow up overnight. Most of the opposition to the core roadmap comes from the belief that they (core) will not
steward the appropriate amount of on-chain scaling. The "segwit now and we'll see what comes next" approach is looked upon with great suspicion by the miners
and users like myself.
The miners want a blocksize increase with segwit both as a consensus signal for bigger blocks as well as a hard fork approach.