I've always thought Gambit was the worst two-parter. It's so slow and boring. It easily could have been trimmed down to one episode.
Gambit, Descent and Birthright are snoozefests that I usually skip.
TNG got weaker with each of its season cliffhangers. BOBW was excellent, Redemption was good, Time's Arrow was OK, and Descent was meh, IMO.
Yes, Gambit could have been an one-parter easily, but it didn't have the absurdness Descent had.