I think the S1 episode I remember most is "When the Bough Breaks". It was meh at best, but could have been improved just by rewriting the ending: make the Aldeans infertility permanent.
1. It would have had more gravitas. No smarmy convenient win-win solution, this is conflict on a desperate, primal level. The Enterprise retrieves its lost kids, but a civilization is sentenced to oblivion as a result.
2. Picard would not have risked two officer's lives unnecessarily by trying to beam them through the shield. Think about it, with the bargaining chip Beverly offered him, all he really needed to do was comm Radue and tell him: "you give us back our seven kids, we can give you hundreds of your own". Take away that bargaining chip and the risk becomes necessary.
3. Radue's character wouldn't have undergone that stupid flip flop from "arrogant head of state" to "I'm so humble help me pleeeeez". Instead, once the Enterprise forcibly retakes the kids, he demands that they leave, refuses any overtures of friendship or assistance, and vanishes his planet once they're gone.
4. Because the Aldeans' relationship with the Federation is adversarial to the end, it's easy to explain why the Federation never gains access to their vast knowledge or incredible technology.
5. With this darker ending, Picard is unlikely to wind up with a stuffed tribble stuck to his back.