What you see in the table has little relevance to the actual numeric precision of the actual data values.
As you can see from the Table to Excel tool there are no options to specify formats. You simplest solution is to format the columns in excel manually and/or create an excel macro to run through the process for you if you are doing this numerous times and it really bugs you.
Switching to other formats including numeric scaling, rounding and truncation is still no guarantee that you will get the fixed visual precision that you want, since excel still has to interpret what you have provided and deal with floating point representation from its inputs.
