The improvements to capacity planning are making it much easier to do team and individual capacity planning. I would love to see an end state where I can provide a set of information on a record and have Aha! calculate the optimal plan for me. The data I would want to capture on my records would be:
Total effort estimate per team that will work on it
Should work be completed in series or parallel
With this information, the tool could (theoretically) work out when all the work should start/stop and avoid conflicts (as far as possible) to provide the optimal path.