Not really.
1. They were made in the 1990's
2. They were very unstable, so not that useful. Bucky was the perfect assassin.
I agree. My only gripe was when he said he wasn't the only Winter Soldier. I wish that line would've been delivered differently and eliminated him saying Winter Soldier. He should've said something along the lines of him not being the only enhanced soldier hydra had attempted to create or had created. To me, Bucky is the only Winter Soldier.