This might be an unpopular opinion but for all their stubborness and perhaps delusion, I am largely okay with Becky and Jackie reopening the Lunchbox. For one thing, the old restaurant WAS a big success for many years before finally going under, so it's not like it's a completely bad idea to maybe give it another try, especially given Jackie's previous involvement with it.
And depending on how long Becky has worked at La Casita Bonita, it's possible that she really DOES have a chance at being able to run a successful restaurant. It is a shame the idea of her going back to school for a degree in business management got lost once the revival of Roseanne transitioned into this show, though--that would be go hand in hand with this story. It certainly is worth thinking of for the future, especially if this venture doesn't work out.
I will agree, though, that Darlene's decision to have them go for it was a bit too tidy. Nonetheless, I'm going to stick it out and wait and see what happens.