I agree with you. The Tavara's weapon works fine if we shift the special weapons autonomy to red. But if we try to use it ourselves on construction ships for example, it never works on the intended target in spite of having 100 energy..
Also, outside the realm of special weaponse, the Dominion battleship like other Dominion ships, is abysmally weak when compared to ships of the other races that have the same offensive rating of 37.
The Breen battleship is a little stronger than the battleship even though it has the same offensive rating.
The Jem'hadar ramming ability is far too weak, if memory serves a jemhadar ram could do massive damage to the target.
It would be better to balance it another way, by making Dom ships more crew intensive, as opposed to supply intensive. I did mention this in another thread.
But if the Doms had a crew requirement, the ketracel white upgrade instead of impriving lifesupport could actually imprve recruiting rates of Dom bases. If they had the extra resource to care for, ramming away crew would be a cost that would compensate for the power of the ram.
I certainly don't want to imply that the jem'hadar ram should destroy a galaxy class. But it should certainly cause the percentage of damage to it in the same proportion of the damage dealt to the ship in the series... say 25%-30% damage as opposed to 14% that we now get for it.

Other than these minor glitches, FO is FANTASTIC. Keep it coming guys
