Arrested development at Merrimack
What's past is prologue in Homestead Crossing.William Donnelly's Homestead Crossing - at Merrimack Rep through September 30 - is the kind of new play that is just good enough that you wish it were even better. It's steadily amusing - and to be fair, it's also, finally, intriguing; yet it almost cries out not to be produced yet, because it's only about two thirds of what it could be.But how is that pos…