Some good reading here IMO the BOP was running low on power to use its warp drive as it had destroyed several earth outposts with its new plasma weapon using the cloak and firing the weapon must have used a lot of ship power to much for romulan scientists to prodict.
Also I also think that the earth outposts were on asteroids making them very protective to the existing romulan weapons, the outposts would or possible not be seen and I would assume that the Romulans would not have intel on every outpost making some starfleet outposts undetectable to the Romulans.
I was thinking how would the BOP do against the Klingon battlecriuiser in combat would it be easily beatin or would the BOP beat it with its plasma weapon .?? I'm assuming that when the Klingons and Romulans exchanged tech the Klingons were better of can u imagine a Klingon battlercruiser with cloak plasma and Distruptor weapons more faster warp speeds and more power !!!