It was going to be cheaper than DCA's version, no? I'd call that cheap, because you just can't do CarsLand if it's not on the same scale as DCA's version. Not a lot of people were dying for a Lightning McQueen ride...the sheer massiveness and attention to detail is what makes CarsLand. Building it using less money, therefore diminishing its scale, would be what I'd call a 'cheap' version.
Also, there's a down the road for everything. It's not like Disney just won the lottery and has to build something now. A couple years ago we could've been having this same conversation and you could've said "there's no such thing as 'a few years down the road' at Disney" when talking about a DHS makeover...yet look where we are now.
Not only that, but if Star Wars Land gets built, that means more money and more guests in DHS, meaning more funds to build with and more need to enhance the park. So "a few years down the road" could be a very real thing.
Basically, if Disney has x amount of dollars they want to spend, should they use it all now, or wait for more money, as well as more ideas, to come in? I'd rather just wait for something original and interesting rather than get a crummy off-the-shelf hand-me-down right this very second.