2019-2020 Mavs Trade Discussion + Salary Chart

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They punted on more than 10mio that could have been used to improve the roster.

This is only true if they didn't work to explore their options

when it comes to the value of a TPE

It's not just posters that call the TPE an asset. If they don't find the deal they want that doesn't mean it's not an asset. 

10 + mio in capspace are an asset. A TPE doesn´t have the same value but is still an asset. If the Mavs don´t use it they will be left with nothing. Lose value.
That´s the definition of bad asset management.
What you are describing is the...If I do nothing I cannot make a mistake approach.

I'm not describing that approach at all. If they do nothing then they're failing. What I want them to do is work hard to turn over every stone and even create opportunity if possible. If they do the work but find no deal that they like and that fits within their plan, then standing pat is the right move. 

They did a good job with the big decisions in the last two seasons but still disregard minor assets

Their minor decisions are running around on the court helping Luka and KP win more games than any of us expected. Their minor decisions have even gone out and won games without Luka and KP.