Yeah, the multifarms are much better, except that you don't get a 1-block farm, in a lot of points:
Multiple small farms in one: You don't need to waste that much space for just a netherwart farm, do you?
Interchangeable: You have crafted a watermelon farm, but now want to use a treefarm. Well, you will have to craft a new one for that.
Variable size: You may choose your own pattern and size to fit your taste. No more wasting space on huge square farms. You can also shape it to make a aesthetically pleasing garden.
Less infrastructure required: You can now have very simple setups, unlike the huge pipe cthulhu's you used to make with the small 1-block farms. Power and handle four different farms with one powersource, one watersource, one input and one output pipe!
So yeah, it's better to get used to these. Plus, can the old farms harvest apples from trees without having to chop them down? Nah.