Madman Entertainment's handling all their Hasbro series poorly:
My Little Pony: FIM - Single DVD releases, followed by bundled box set (lacking all extras), long after the USA.
Pound Puppies - Cancelled after a single DVD release, surely decent stories of cute puppies can't be that difficult to sell (i.e. Buddies series from Disney)?
Transformers Prime - Single DVD releases, followed by bundled box set (lacking most extras), long after USA. Only Blu-Ray release is equal to overseas release.
Madman Entertainment doesn't seem to really care about their (non-anime) cartoon series, their Cartoon Network label was even worse. Only the older cartoon series released on DVD via the retro line seem to be the exception.