So most people know what the biggest issue is here with both of the secondary stats -- MP/TP regen is (mostly) fixed at level 50, and pumping out more skills means that those resources are drained faster and a Bard has to give up damage to replenish them (if one is even there and if it is not a raid DPS loss to do so).
So why not have spell speed compensate for its own weakness? Now, you may be telling me that this is Piety's domain, but I'm not talking about raising MP or the MP gained per tick. Instead...
Spell and skill speed should increase the rate at which MP and TP ticks occur as if they were a 3.00s spell.
This fits in perfectly with the theme of the stat (that is, increasing the rate at which your character performs various actions), and it also means that increasing skill/spell speed keeps your rate of TP/MP decline roughly the same instead of causing it to skyrocket.
Additionally, since the formulae and the base coding is already in the game's engine, this should be a simple (and thus quick) fix for the stat, one that could optimistically be added in 2.5 or 2.51. Please be clear that it's not intended to solve all of the problems with the stat; of course, I'm specifically referring to its lack of interaction with DoTs and HoTs, which could also have a band-aid fix by making spell speed act like a lower scaling determination for DoTs (wouldn't that make that spell speed buff for SMN more interesting?).
Essentially, we add more gear options for practically every melee and help to solve SMNs mana issues by USING the stat they're stuck with this tier (even if it is a small improvement).