I am puzzled by this thread.
Having used all the string libraries, Solo, Chamber, Orchestral, Appassionata and now Dimension, I recently did one of the most extreme examples in film music of legato strings - Vertigo's Scene d'amour. This is the greatest string writing ever done for a movie. And it features violin legato more than any other musical articulation.
Using the Dimension Violins on this was simply FABULOUS! I absolutely loved the legato sound of the violins - it was molto espressivo and very connected, fluid, beautiful, and the complexity of slightly mistimed transitions added to the realism to an uncanny degree. And this is in comparison to ALL the other string libraries.
Also, I had programmed the Grieg "Last Spring" for the Appassionata/Orchestral strings, and then reprogrammed it recently for the Dimension violins. They sound as good or better in legato.
True, Appassionata has some more extreme portamento, mainly because it is a huge sweeping fluid sound of twenty players on one note. Also, if more samples/programming tweaks are added that is always good. But I simply never heard any problem with legato, and in fact think it is amazingly beautiful in the Dimension violins.