To me it feels like there's something a bit "off" about this one. Like it kind of doesn't quite seem to gel
, somehow. The two subplots seem entirely seperate from each other, almost as if the script needed an extra rewrite that it just never got, to really pull things together. I'd even go as far as saying I suspect it was affected by the Writer's Strike. It's as if they got so far with it and then the writers have just downed tools and gone home, leaving the producers to film what they've got and make the best of it. The "frozen humans" subplot doesn't seem quite polished enough (there are some nice moments, but it still doesn't feel substantial enough for what it is), while the Romulan reveal is, as the OP says, terribly anticlimactic. Neither subplot dove-tails with the other one the way they probably ought to have.
I do like the scene on the bridge at the start though, with Riker, Worf, Deanna and Data just shooting the breeze. That bits a good show of the cast chemistry.