Maybe fixing the relationship will put them on the path to fixing the glitch in time. I still think that someone did this on purpose. After all, Bernie said that the time travel device looked like it was working correctly, so they must have been set up. After all, if you have photographic proof that someone did something seriously illegal with someone else made up to look exactly like me, it would put a damper on our later relationship. And that's what our unnamed evil schemer has done.
There's still the matter of Vicky, of getting the timeline back like it was before, and of removing the extra Lois and Clark from history. I'd bet that Bernie's blood test will show something most dreadful that will force Kent and Lane to make a decision about their very existence, to choose between their own future together and that of Lois and Clark together.
We still don't know if this is an alternate reality or an altered reality, and there's a huge difference. If it's an alternate reality, then Lois and Clark can go home and leave Lane and Kent to live out their lives in bliss. But if it's an altered reality, then they'll have to choose which history to keep and which couple will continue to exist. Wouldn't that be a dilemma of monumental proportions?
So, where's the next chapter? What's the next complication? This can't be the happy ending Lois loves so much! Surely there is more evil to be perpetrated on our favorite (pairs of)lovers?