I believe you're talking about different things. It sounds like Gruntler meant Reprise, the cheap bladebeam attack for preventing overcaps when fixing procs or prepping for Manafication.
It was not shown in the job actions trailer, but that doesn't mean anything; half of our spells that we can be certain haven't been cut weren't shown in the trailer either. If Reprise is still in, its cost will probably have been reduced to 4|4 or 3|3, and, regardless of its cost, we would need to do a new cost/benefit analysis of it to determine the circumstances under which it's still an effective use of mana given EW potencies.
As for Shurrikhan's criticism of Riposte, it costs more than Zwerchhau and Redoublement as a penalty for failing to follow through. This could have similarly been accomplished more demonstrably with 30+10+10 costs, but 20+15+15 is far more lenient.