Not really, no. Your getting 96 mp5, 250 sp, and a weak healing proc (2.5k to 3.5k instant heal, decent proc chance, 45s internal cooldown). (I'm ignoring the HP5 and I'm tempted to ignore the healing proc. Both are damn close to useless.)
For comparison,
[Solace of the Defeated] +
[Forethought Talisman] gives 128 mp5, 261 sp, and a weak healing proc (3,5k HoT, 20% proc chance, 45s internal cooldown). Frankly, any random combination of trinkets is going to be at least comparable, and if they're Ulduar/ToC and vaguely appropriate for your gear/spec/role they're likely to be significantly better. I don't think there's anyone who really benefits from the Onyxia trinket set.