Originally Posted by FlyDeltaJets87

You may think it's that easy but the impact of making row 10 two FC seats instead of EC could be more than you think, as it becomes a snowball effect up to the exit row seats and their alignment with the exits, which is fixed. Unless there's a lot of extra room in Row 10 (and I'll admit, sometimes there is a huge amount of extra legroom in the first row of EC on some aircraft), two more FC seats would impact where EC actually starts. FC seats have 37" of legroom which already tight so you can't really compress the FC seats forward any further. EC seats have certain legroom (34") and you can't compress those. Standard Y seats are 30-31" so they're as tight as you can get as well. You could adjust the amount of EC and Y seats (add more or less EC to get proper alignment), but adjusting the ratios of F to EC to Standard Y would be a little more difficult than you think and is as much a practical decision as it is a revenue-based one.