What is even more Important than Project Visibility?

Better Planning and Visibility help BUT BIG Performance Gains Come from Managing Differently 

Good plans are essential. 
Rate of buffer consumption is an effective way to track progress. Increasing the rate of execution requires changing the way you manage execution.

If you need only better planning and visibility, you can achieve with traditional methods.
Set of tasks can be planned better even without Theory of constraints (TOC). 
For status report, you can look at Actual timelines against the baseline.

But, unless you
– Reduce Work in process (WIP), 
– Leave task-level measurements, 
– Plan with shorter cycle times, and 
– Follow buffer-based priorities
You will not be able to align Execution priorities. 

You will not be able to complete your plans faster. 
Throughput will not increase.