I originally bought Maschine with some extension packs.
Then I detected iSpark for my iPadPro and soon understood that it offers a great workflow, definitely easier and more straightforward in use than Maschine. That was the main reason for buying Spark LE with Spark2, getting a really nice workflow between iPad and PC, far better than anything NI has to offer so far.
From my view Arturia have a sleeping giant pair here, and just don't care about it. They miss their chances big time here. The iPad app has given them a much better access to new users, but they give them the feeling that the product is already history because they do nothing about it. Bad management, I would say.
If they, for example would finally offer some actual expansions like Future Base packs, with samples and midi patterns, they would sell it like sliced bread, if it comes with the announcement of further development. But if they miss this chance and don't act soon, their whole development will be for nothing.
Arturia should definitely wake up in this matter. I for one meanwhile prefer using Spark/iSpark over using any Maschine, stuff, simply because it allows easy mobile plus PC workflow in one go.