I can't compare this to Quibi; this was more like the old guard throwing a temper tantrum they were getting new management and trying to throw them a headache right at the start which was dealt with when Zucker was terminated but his minions remained. You definitely get the feeling that Chris Licht took one look at this and said 'that's done' when he gets into the office.
It's more comparable to Seeso, NBC's comedy app which always seemed to be a niche plaything and was never going to do much for NBCU's streaming ambitions, along with NBC Sports Gold and its 10 esoteric sports plans where you had to pay for access to soccer, cycling, rugby and/or NBC Sports Philly debate shows, each separately.
It's also still the first month, so however customer service has to deal with it will likely be with pricing credits, which I feel like what will happen with HBO Max involving Discovery+'s yearly subscribers (or a refund for those who authenticate HBO Max with their pay-TV provider). There just isn't much of a base to involve much complication.
As for Discovery+, HBO Max has just had major updates which use the native players for Apple/Google/Fire TV and Roku so at least there it'll just be a matter of adding the titles and appropriate D+ verticals, along with updating the Turner cable apps under Discovery's "GO" cable app brand. Compared to two years ago HBOMax is a joy to use now.
And another minor thing, Discovery is likely to FINALLY kill Turner's Stretch-o-Vision for what little SD content remains on TNT and TBS.