Compared to Bedrock Edition, Java lacks so much the ability to accurately remove block lines when moving. That is, the same thing that this mod already does, but instead of placing blocks, they should be removed when holding down the block destruction button.
Perhaps adding a new mode switch keybind would be a good idea.

This is out of scope for this mod.

Are there any alternatives for this?

My other mod FVT allows you to set the delay between breaking blocks in creative.