From my experience (about 3 games a week against the Romulans, 1 a week against the Klingons, but only two total opponents, so maybe we are missing something important) it is not very difficult to avoid most of the Romulan fleet with the majority of my own fleet. The Romulans will be able to get shots off with some of their ships, but from my experience, if the Romulan fleet splits their torpedo shots over 2 turns they are at a severe disadvantage. We have spent a lot of time discussing strategies and play testing different options, that is what has led us to the ever evolving house rules document I linked in the post.