Hm, I would disagree with adding debris for a few reasons. Probo's advice is good, but I have an addendum for it.
Since this asset is meant for every block color and type, you would probably be best just making the block completely white for a frame before the pop. If you have the option of 2 frames, you can have it shrink and swell just before the pop, and reuse the animation for every type of block.
Particles are in general well done, however the bubbles on the outer rim (more so the ones in the lower half of the animation) jump around in a staircase movement, try to imagine their center when moving them, as they change shape. That should get rid of the staircase, which I think might be an artifact of your process - which looks like you were moving the final sized bubble first, and then changing the shape after.