I'm the only one surprised for not seeing Blockchain.info enabling SegWit transactions? It's clearly not because they don't have the necessary developers or resources. The only reason I could think of, is having Roger Ver as an investor there. This applies to Coinbase too. Because of their big userbase If they enable it, It will just make our lives easier when it comes to the fees.
They aren't thinking about user experience right now. All the crying about users suffering from high fees is a smokescreen that has to do with the long term plans of NYA companies like Blockchain.info, Coinbase and Xapo. Mike Belche of BitGo probably put it most bluntly -- these companies expect hundreds of future on-chain capacity increases with far greater scale than 4MB.
Maybe they feel there is no obligation to run Segwit, since bigger block sizes are supposedly coming anyway. Or maybe they feel that not running Segwit is the little leverage they have left in pushing the ecosystem to hard fork next month.
