Massed percussion is a different genre. It can be overdone, even in traditions where it is very important, but it's capable of being extremely intrixcate and delicate as well as exciting.

But it doesn't belong in the kind of music where bodhrans are at home - and by that I mean, not just frame drums, but teh frame drumn played in the Irish techniques.

And I'd say the same about pretty well any instrument, not just the bodhran. It's a music made up of individual instruments playing together, not of rhythm sections and string sections and so forth. A kind of chamber dance music even. I can quite imagine that massed bodhrans might work in the same kind of setting as massed bagpipes, such as a marching band - but neither would be too welcome in an indoors session or a dance.