I think Edwin can expect 4/80 at the absolute least. He'll be entering his age-34 season. V-Mart just got 4/68 entering his age-36 season with a worse track record.
All the same, consistently trading 6 years of cheap high end talent for 1 year of proven but expensive talent is method of team building that will prevent perpetual contention.
It definitely wasn't cut and dry and the time. Norris' numbers last year were absolutely silly in AA and AAA. Trading a borderline top-10 prospect for one year of anyone is a risky proposition. If you guess wrong, it could be franchise crippling.
And payoff games typically feature better offenses. Not surprisingly, David Price pitching in a playoff game is still David Price, regardless of how tempting it might be to draw a narrative from 50 innings of bad ERA luck.