This has more or less always been the case with reasonably large C++ projects. I don’t know of any developer that doesn’t use Visual Assist as a wholesale replacement to intellisense, it is better than intellisense in every way and absolutely worth the price.
Commands you will use all the time with VAX:
“Alt + G” : Go to declaration/definition of functions, variables, types etc. It also shows you all variations of the function if it has overrides. Unlike intellisense this is INSTANT even in huge projects!
“Shift + Alt + O” : Searches all files within your project in real time as you type with no delay.
“Alt + O” : Toggles between header & cpp files.
“Shift + Alt + F” : Finds all refernces to the variable/function/type you have selected WITH context, so if you search for a common function name like “Tick”, you will only get the tick uses for the class you are searching from 