I play DW MP modus only. Whyle i found the aTMA in SC quite accurate, the aTMA in DW takes to long to update solutions to me.
While in SC the manual TMA was a struggle with the contacts pop-down list, making it a self-torture in case of many contacts, this bug has now been fixed (there are others new

)
But apart the aspect of the precision of the solution, there is a much more important (IMO) aspect.
With all already set on manual, I personally consider the realism of the dive dramatically raised again (by at least a factor 3 or 4) when I use manual TMA.
This is the only way i found to study my contact's attitude (in MP): it allows me to follow and eventually understand opponent's maneuvers, and on the long term, even predict his future maneuvers

... so to say sneak into opponent's mind
Also, it is only with mTMA that i come to use ALL the instrumentation aboard, because I am now working with the data "in the hands" and i know what i need much better
Yah... I like that a lot