So, since dynamites and other blowing up forms of mining are not really much used, i suggest improving blast mining:
Increase dynamites obtained from a single ITNT by a factor of 8 (64 per ITNT).
Increase blast radius of ITNT by a factor of 4. (yes, a much bigger boom) Reduce its damage to the played by 4 aswell.
Make ITNT and dynamites not destroy items (is it a bug?).
Make dynamites instantly blow up when placed and clicked (aka no fuse)
and/or
Make (sticky) dynamites instantly blow up when they touch a block (velocity 0)