Mithra is a nice Balance of stats. they're going to be a good few STR behind Elvaan, but of the jobs you listed, DEX and AGI are going to be important as well.

for NIN, AGI as a HI Mod, for THF, as a TA mod and Exenterator

DEX because almost all the jobs you listed have a Crit-hit WS (most with DEX mods...) as their primary dmg source.

The only exception being SAM. So in my opinion, its a 3 to 1 in favor of Mithra. while MP may not "Matter" as much as it used too, You're still going to feel the restrictions, especially on BLU, who already have a pretty low MP pool.

Will it be crippling? No, But honestly, I'd go Mithra. - And i'm not just saying that because i chose the race.

Also yes, a Taru (Melee)DD is foolish. Taru are just plain awful as Melee DD. while its not going to be a huge difference, they lack any strong features in STR or DEX, and are statistically the worse Melee DD Race available. Though the gap is not WTF huge.