Back in the 1.6.4/1.7.10 days, ex nihilo had barrels and sieves for each wood flavor. This was great for consistency. However, for unknown reasons, in ex nihilo creatio there is only one barrel, one sieve and they have an oak wood texture.

Fortunately, ex compressum adds sieves and crucibles for all vanilla wood types so I can use those in my modpack instead of the ex nihilo ones. The only problem is that there is no barrel in ex compressum.

Some people might say that there's no use for a compressed barrel but this would be very useful to consume less liquid. For example you could turn compressed sand into compressed soul sand with only one bucket of witch water. You could waste less time converting dust into clay by converting compressed dust into compressed clay.

The different recipes would be:

Water + Compressed Dust -> Compressed Clay
Lava + Redstone Block -> Compressed Netherrack
Lava + Glowstone Block -> Compressed End Stone
Witch Water + Compressed Sand -> Compressed Soul Sand