I noticed NI did this as well...only updates the non 88 models. I see I’m not the only one holding off on buying a new 88 because of the fear of getting out-modded a week after buying the old version. Wonder what gives...
NI has the 88 note Komplete Kontrol S88 MK2, although I believe it was released quite a while after the others.
I have the NI S61 mk1, and am more than happy with it. I don't really need the extra stuff on the MK2 and I know I'm in the minority, but I like the ribbon pitch-bend and mod on the mk1.
Also, unless things have changed fairly recently, NI MK2 doesn't have MCU support, and while they have said it might be coming, that's been said for over a year now. So while my MK1 is easy to set up in Reaper, the MK2 wouldn't be.
At the moment I have a dirt cheap (cost me £70 on ebay second hand) M-Audio Keystation 88 that I thought would tide me over until Arturia released the MK2. But I'm beginning to give up hope (keystation keys feel like the keyboard should have only cost £25 new).
Will be looking at second hand stage pianos soon.
Think I will probably get a se