While I think that it's great that LL wants to reward premium members by increasing their group space and their offlines, I don't think that it's right to penalize non-premium members by taking away from the little bit they receive.
As a non-premium member, we usually get shut out of key events because premium members have reserved space above and beyond most sim limits. We already have a select few groups we can join to the max and often times have to leave a group to join another. We already have limited access to past transactions, offline messages and even support as we can only file a ticket.
Now don't get me wrong. There should definitely be differences between a premium and non-premium member. I fully get that and accept that differences will be had. But perhaps instead of shrinking non-premium group memberships to 42, increase premium to 84. Offline ims...why should they have been affected if the messages are being received offline via email?
And then on the paid side of things, how is it that after 15 years of premium increases, premium members are still only receiving 300L in weekly stipends? The value of the linden as a currency has changed many times over throughout the years; why not the stipend?
I think it's great that changes are happening. But if it is to the detriment of the people who login on a daily basis who, paid membership or not, are contributing to the ebb and flow of not only the value of Second Life's citizenship but their commerce as well, then who does this truly benefit?