Whiteside's swats, and Wallace's presence on D, are two different things. Ibaka had up to four blocks a night one season, but I wouldn't never called him an elite defensive player. Millsap is top five in blocks this past season, but he isn't among the better defensive big men.
I would call Rip an average defender. Clarkson is a poor defender.
I'll give you Conley. He's not Billups, but he's good.
Rasheed Wallace was shooting up to 5.4 threes per game, and doing it at an average of 34% for his career. Pau Gasol had just one season where he shot 1 three per game. Every other season of his career, he barely shot one every 3-4 nights. I also won't discuss them on the defensive end. Gasol is the better overall offensive player, of course, but nowhere close to Sheed defensively.
Ingram can shoot, but he hasn't taken a single shot in the pros. I can't say he can shoot better than Prince, who shot a consistent 45% or better from the floor for most of his career, and 37% from three. Those are good numbers, better than a Carmelo Anthony, who we all thought was a pretty damn good shooter at one point, also.
Defensively, again, Ingram is good, but no Prince...and probably won't be.
When you lay everything out to analyze, yeah...the Pistons could not score the ball as well as other teams, but it's only because they slowed the game down drastically. They had multiple ways of scoring, and they had it balanced. Due to them being one of the best defensive teams in the last 20-30 years, though, they didn't need to score.
Our guys would need to score, and they wouldn't be able to. That would be the issue.
The Grizzlies remind you of the Pistons because of their defensive presence. This year, they were injured most of the time, but in 2014-15, they were ranked 3rd. Why didn't they get out of the second round? Because they ran into an offensive team that they couldn't keep up with...the Warriors. Memphis would have lost to the Spurs and Thunder, also, because while they had the defense, they were awful from three (so they couldn't spread the floor), they could not get to the free throw line (nobody capable of drawing fouls), and they couldn't grab their own misses for second chance points. All of that, and the fact that they really weren't that great at passing the ball, hurt them significantly against the elite.
Memphis would have needed 2004-level Pistons defense to get past the Warriors. It would have required them to completely shut down one of the Splash Bros and Green, the same way the Pistons shut off the two-man game between Kobe and Shaq (Ben being able to outmuscle O'Neal in the post, and Prince's length preventing Kobe from making the entry pass and engaging in the triangle O)...while keeping the game's score down and draining the Warriors of any offense they can execute.
We would suffer the same fate. We would need a primary scoring option to carry the load, or an absolute wizard of a PG (Magic or Kidd reincarnation) to feed open players all over the court, every possession of the game.