Having a concrete core is always a challenge because of the tolerance issue (concrete having large tolerances, mass timber having tight tolerances, and the challenge of trying to match the two together). If concrete is out of plumb, the higher the building, the worse the problem.
Image c/o: KK Law
Advice
Example of a mainly successful project: Brock Commons — involved a high degree of collaboration: Integrated Design Process — design offered 3-4 options for every connection, which every stakeholder vetted — invested in building a mock-up, where many problems were solved in advance of construction — the design worked with standard panel sizes
Advice
Tolerances are different for each different trade. Mitigate potential problems with communication in the procurement phase.