This is one of the biggest holes in Sonar imo. A well integrated drag and drop type of sampler to trigger, edit, and manipulate loops and one shots. There's very good examples out there of where to start. Something along the lines of Ableton's Simpler/Sampler
(probably the best out there right now) or something even as simple as Studio One's SampleOne. This is very critical for electronic musicians/producers who are not in the world of live instrumentation. Yes, there are 3rd party options like Kontakt/Battery, but the point is you really shouldn't need a third party app for this relatively basic functionality that a lot of the main competing DAWs have out of the box. Plus, those apps can be buggy and resource heavy sometimes
(not to mention pricey) when all I want to do is something basic like edit and trigger a drum sound or sample.
Side note: I also suspect, in addition to the whole not having a MAC version thing, this may be one of the main reasons Sonar tends to get overlooked by a lot of people. There's a reason all the "big name" DAWs provide a solution for this. I really like the way development has been going with the the new business model, but this imo should be near the top of the list. Most people looking to invest in a DAW are more likely to need a solution for editing and triggering samples than a drum replacer and a theme editor. Don't get me wrong, I do think those are very cool features to have, just not as practical in the process of making music as a sampler would be.
This is just my observation and opinion based off of what I've seen while networking and collaborating with a lot of different producers and musicians.