One are where I feel JD really screwed the pooch on the 1-series is with the transport height of the MMM deck. The 1-series I have observed seem to barely be able to get the deck off the ground even when transporting. This is especially true when using the mechanical lift arms attached to the 3PH.
I have seen 1-series with the 3PH all the way up and the deck is still all but touching the ground. This makes it pretty much mandatory that you remove the deck prior to doing any dirt work.
Kubota seems to have done a much better job with their advertised 6" ground clearance on the MMM deck.