Explain your idea

So, at the moment, the gunpowder barrel item is pretty useless, but it looks cool and goes with the theme. So, here's an idea of mine for how to make people actually want to use them: Taking some inspiration from TerraFirmaCraft's Powderkeg, it could have a UI where up to 9 gunpowder can be added, and a variable blast radius depending on how much powder there is. It would be more efficient with its gunpowder use than TNT, with adding an equal amount of gunpowder pieces as are used to craft TNT resulting in a larger blast radius, however this would be offset by chain detonations not being possible, like it is currently. This would keep its original design intention as a mining explosive, better to use for opening up cave passages or easily harvesting large clusters of ore, but worse at blowing up structures.

Another suggestion would be that, unlike the TNT block, the Barrel does not turn into an entity that falls, so it stays where it was placed.