Yamaha was already really restrictive with what companies could and couldn't do, allegedly (they're supposedly the reason Miku's had so many updates in comparison to the rest of Crypton's lineup - she makes the most money). With V5, they tried going back to the original concept of Vocaloid: a serious program for professional musicians. In the process, they disregarded a maaaaasive chunk of their audience who made Vocaloid what it became in the first place: hobbyists and amateurs. As if to drive the point home, they jacked up the prices, got rid of free trials, made V5 files incompatible with VSQ, made it almost impossible to use on computers that aren't expensive and heavy-duty... I feel like they kinda spit in our face, really. Or maybe I'm just taking it too personally.
A lot of companies were already drifting before the switch to V5. Most Japanese V4s, depending on the company, come with assortments of new music-making software, and then of course there's Piapro Studio. It's kind of sad, but it's still refreshing to see companies standing beside both their creative freedoms and that of the non-professional users like us.