You're missing the point sir.
The FTB designers like the mod just fine. They like it a lot.
@Jadedcat for instance is a part of the FTB team but she uses the mod in her non-official packs, such as Agrarian Skies.
As the team migrates more towards strongly-themed packs, we may see more addon-mods like these where they're suitable. For packs such as Infinity however, which is more of a kitchen-sink/showcase pack, it makes less sense: you can't add it without breaking another mod's (Tinkers Construct's) original content.
You obviously enjoy more themed packs (just like me), so it makes sense that you would have encountered mods like these more often.