A possible way to add depth to Garen without harming his accessibility

As we all know, Garen is a very basic boy. There is little room for skill expression due to how basic everything in his kit. My idea is to keep him as a simple introduction character while adding a new layer of depth to the character for more experienced players. Now you may be asking yourself, how would you change Garen while keeping him basic? That answer to that would be to give Decisive Strike a more interesting ability.

In my mind, the concept of his Q is perfectly fine, cleanse all move speed slows, gain move speed, deal bonus damage and silence the target. It's simple, straight forward and gets the job done. But it also could be taken a step forward. The change would be to reward Garen for holding onto Decisive Strike. The longer he holds onto the Q, the more speed, damage, and silence time he would be rewarded.

While I do not want to deal with numbers, the concept would be along the lines of:

Held 1 second or less: Minor move speed, damage and silence time

Held for 2 seconds: Moderate move speed, damage and silence time

Held for 3 seconds or more: Major move speed, damage and silence time

This type of change would add a certain amount of deliberation and patience that goes with the rest of Garens kit. While the rest of the Juggernauts are all about swinging around doing lots of aoe damage when possible as soon as possible, Garen has always been more about singling out a person for personal punishment.

Sorry if this was a poorly worded post, this idea just popped into my head and it seemed like an interesting way to add depth to one basic Demacian.

Any thoughts?