I wouldn't mess with Teamwork TOO much... It may not be perfect, but it's the best multiuser system I've ever seen in a design software. I don't see Autodesk, Bentley, Adobe, Nemeschek, Microsoft, or even Apple coming close! I've assisted on several AutoCAD jobs where the team was begging for a similar solution, and I couldn't find anything other than to suggest ArchiCAD. Any improvements should NOT increase complexity.
Chuck Kottka
Orcutt Winslow
Phoenix, Arizona, USA
ArchiCAD 25 (since 4.5)
Macbook Pro 15" Touchbar OSX 10.15 Core i7 2.9GHz/16GB RAM/Radeon Pro560 4GB