While I kinda half agree, I think this is probably a function of controlling the instrument model that there isn't a particularly graceful way around....
SWAM seems to have conformed to a common control scheme of triggering a slower transition in the lowest quarter (or so) of the velocity range, and for strings this kinda fits 2 functions in my mind:
• quick, reach-based slurs, and
• stylistic glissandi (which I don't really ever use).
Admittedly I have trouble controlling either one reliably with velocity, and tend not to use it much. In LASS I'll go edit notes manually if I need a large interval to sound believable, but with SWAM solos played pretty exclusively on a Roli, I get a gratifyingly authentic version of the first type just from large moves across the wave/keys just as you would a fingerboard. And this produces an interesting result - and anticipatory bend on the outgoing note and a smaller, settling bend on the incoming one (sometimes not, though).
The built-in ones, on the other hand, sound to me like they're doing a continuous glide from stop A to stop B, and I'm really not sure how else you'd do it. The good news is that it's entirely defeat-able and all of the Solo Strings instances in my projects have transition time set to a slider rather than velocity
...so that was a long way of saying "it's optional."
What I am curious about in this new Sections set is whether there is any kind of multi-instrument control over these things - i.e. can I "loosen" up the group so that transitions sound more believable (is there a buried setting somewhere?) or is this really a single model running a body that produces the sound of multiple instruments?
I am reminded of WIVI modeled winds, which were so lightweight (i use the past tense like I don't still have the clarinet in my orch template) that you could build sections by simply stacking up individual instances, complete with spatial placement, individual vibrato controls, auto-divisi and randomization/humanization settings that, if I recall correctly, were mappable if you wanted to play around with wandering pitch as a performable technique. I think that's kinda what I pictured at the notion of SWAM sections