Just started with KSP again - sadly I have KSP 1.6.0 which does not seem to support MechJeb2 2.8.1.0. Is there a solution, or do I just need to be patient? Remember old MechJeb - and loved it!

there were no code changes from 1.4 to 1.6, the latest CKAN version will work on 1.6 without recompilation, or use the latest dev branch: https://ksp.sarbian.com/jenkins/job/MechJeb2-Dev/