Biggest surprise here is that after these guys pushing segwit for well over a year now the wallet interface still doesn't have support for using it!?
Update after next-- we'll be doing a short release for segwit support right after 0.15.
Feature freeze for 0.15 (next release) was scheduled on July 16th ( https://github.com/bitcoin/bitcoin/issues/9961 ), segwit lock-in wasn't until aug 9th. We'd shortcut the process for a serious emergency, but not for something short of one.