I've been told a different story regarding the 15s: that Donnybrook would take them off Ringsend altogether, full package, and Harristown would stick with their lot. Leaving the suffixed 15s in Ringsend makes more sense, although that might need a funny AVL code for them
Also I've been told that there would be no loss of 145 duties even after 184 leaves, but it hasn't been specified how.
14s leaving Summerhill makes sense, they have very little work on it (12 duties MF, 8 Sa, 5 Su). It's also what I've been told. First I hear of Clontarf losing the 27, it's a sizeable chunk that they have, but I suppose Ringsend would need a gap filler once the 15 leaves.