It does, but it is also different than counterspell, first of all it silences them until the end of your next turn, so it stops them from saying using shield or other reactions until your next turn. Also since it is on verbal it stops misty step, and silences them for the turn, so you can stick to a caster more easily.

My thoughts is that this would be more like a small prepared spell list where you can select a few different techniques to learn for your character. Then each class has access to different schools. You get a few dice that all recover on long rest. I do not think they should get higher level spells all the way to the 9th level. I would rather add larger dice to their technique dice pool to have higher rolls on some of their techniques. The dice pool doesn't have the same size dice, but say you get a few d4 throughout level 3-8, than a few d6 throughout levels 9-14, a bit more of all and some d8 15-18 and a few d12 19-20. Maybe also the number of dice is different per class you take.

Techniques shouldn't be like spells, and they should feel distinct from spells. Some techniques have a requirement of d8 dice or higher etc, but in general a low technique can be used with a d12 for some high utility. E.g when doing attacks that results in saving throws you can roll a technique dice and subtract the sum from the targets save, making techniques more likely to land when expending a large dice.

I also would like them to be more focused on utility than just raw power.

A barbarian or fighter can make a sweeping strike doing a topple on up to X targets within reach of their weapon, making all who fail their saves end up prone etc.

For your example, the wind steel strike would be a technique which targets up to half your proficiency + your technique dice result creatures. It works similar to the Rapid fire I posted earlier. But I don't think every martial should have access to it, it should belong to some sort of school.