I found that the initial release of V17 was much less stable than V16, but V17.1 was much better. V17.2 is in testing and should be out fairly soon, I would think, and I have found it on par with V17.1 in this regard. I am just finishing up a huge architectural tutorial and have found that TC V17.1/.2 has handled it well.
One thing that was added from V16 was the ability to add a cut plane height for for component walls. That solved an issue that would not allow users to see all components while in world plan view. Aside from that I am not sure, off the top of my head, what else was changed or added.
Hope that helps.