For the exact reasons mentioned above. Ripsaw doesn't have long left unless it has a serious revamp, (which costs money that AT would rather be spending on something that will attract guests to the park), and even then you still have a problem with what you put in place of ripsaw.
Well Rameses is older and Chessington are spending a hell of a lot of money to get that up and running after this 'incident' last year, its the same ride so there isn't any reason why it could not be moved from FV to X-Sector. Yes they said they will be removing it sometime up until 2019. BUT unless the ride falls apart, costs a fortune to keep running there is no reason why it can not do 5 years in the X-sector.
Plus with such a small number of flats, that 2019 date could possibly be extended unless they don't get more flats in soon.
Plus look at Slammer, how much money have they spent on that ride for it to be down 80% of the year? They are still bringing that back next year as far as we are aware.
If anything this is just an idea and to be honest is is not a bad idea as it would be a cheap move to give them a reasonable amount of space in FV and to fill the gap in X-Sector.