When Dallas placed the FT on Lawrence last year, he had compiled one really good year (14.5 sacks in 2017) and one "average" year (8 sacks in 2015) coupled with two injury plagued, below average years in 2014 and 2016.
While the Cowboys played a bit of option theory with the FT in 2018, two things were clear at that time: the price for a DE, above average or not, was only going to go up and, if Lawrence could put the injury "label" behind him, he would command top dollar.
I have no problem with the Cowboys taking the "wait and see" attitude with Lawrence with regard to the first franchise tag. Conversely, I have no problem with the FO balking at setting the market now with Lawrence and trying to extract value another way via a trade.