Seasons One and Seven were similar only in their unevenness. Quality wise, Season Seven's best episodes ("The Pegasus," "Lower Decks," "Preemptive Strike," "All Good Things") are miles above the best episodes of Season One ("The Big Goodbye," "Conspiracy" and "11001001").
Conversely, while Season Seven had a number of forgettable episodes, none approached the banality of Season One dogs like "Code Of Honor," "Justice" and "Symbiosis."
Why?
Now for some heresy!
Let's be honest... a major reason for this is the comparative involvement of Gene Roddenberry, who was simultaneously Star Trek's greatest asset and greatest liability, as he had been since he first pitched TOS in the early 60's. Unfortunately by the 80s, the balance had swung well towards the liability side.
Season One was the product of GR's utopian dreams run amok... a bevy of heavy "message" stories that did little to entertain the audience in the process. This "GR Utopia Syndrome" would dog TNG until he began to step back from day-to-day production, allowing the fruits of labors from Michael Piller, Ira Behr (albeit briefly), Ron Moore, et al. to carry the show to greater heights than could be imagined based on what we saw during Season One.