This is a knee jerk reaction and a terrible argument. You don't move superstar players unless you receive one in return or a #1 pick with the potential to draft one. They're going to fix the hack-a-player strategy this off-season. He's 22 and even when he's on a 5 year, 120 Mil contract, he'll still have tremendous trade value despite the emphasis on small ball. The cap will be 100-110 million and Drummond will be locked down for the foreseeable future with no way to include a no-trade clause in his deal because he doesn't have the necessary amount of years experience in the league. This whole argument of yours is largely flawed and based on personal views rather than facts.
Here's a list of starting centers defensive ratings. Drummond is 9th in the league. There is a trend of all those centers being on better teams than Drummond, particularly at the top of the list.
http://stats.nba.com/league/player/...rPosition=C&StarterBench=Starters&CF=GP*GE*30
List of highest DWS (Defensive Win Shares) amongst NBA players this season. Andre Drummond is 2nd in the league. (Click on the DWS column)
http://www.basketball-reference.com/leagues/NBA_2016_advanced.html
If you're curious on how they calculate win shares:
http://www.basketball-reference.com/about/ws.html
Here's a breakdown from people who actually watch film for a living breaking down his game.
http://bballbreakdown.com/2015/11/24/monster-andre-drummond-unleashed-detroit/
His numbers and net rating will likely improve if the league moves to stop the hack-a-player strategy, yet you want to move probably the first drafted franchise player this team has had since Grant Hill. Also, the whole issue with Howard that teams have is mostly his off the court personality and injuries. This season he has sat out one of the two games for back-to-backs. I'd spend a little more time to think about trading Drummond.