How do i smooth out transitions between different animations (Vertex Animations) ?

Im making an rts with lots of units, so i decided to go down the rabbit hole of using VAT (Vertex Animated Textures).
Its great for performance and im having good results, but the biggest issue right now is how do i smooth out the transition between animations.
So for example when im idle, and then i switch animation to attack, it goes to abruptly into attacking animation, and that looks a bit unnatural.

Sure this is an rts so such details are not so important maybe.
But id like to know if there is something i can do about this.
I know there in VATs we can create a specific vat for blending between 2 animations, although the cost is an extra texture just for that.

Perhaps there is something simpler to make a smooth transition without using that? Something like a lerp? Or blend? Please help.

Here’s the video:
You can see that when unit switch from idle to attack, they do it too abruptly: