Strategy: Get good.
For real, though. In real life basketball if a team has great shooters and no big men with any good skills what would you do? You would put more pressure on the guards that probably have to slow the ball down for their bigs. Outside/Slow. What do you do to a team that has amazing bigs and subpar guards? Inside. What about a team that likes to run as fast as they can and scores with bigs and guards? Neutral/Fast.
The guessing isn't really guessing. It's planning for your opponent. Imagine that it is your players planning for specific plays/sets the other team is running, just like what happens in real life.
I definitely agree with the sentiments in this thread that he has been losing games for reasons other than GDP....however that said, I am not a fan of GDP at all. When GDP was introduced its intent was to get teams to mix up their tactics, but why? I have built an inside team...why should it matter if I never play outside tactics?
Using your example from above....You are correct in your assessment in how to defend them....that said, the team with the great shooters and no big men is never going to decide to play Low Post because they fear their opponent knows outside tactics are coming.
Using the Steve Nash led Phoenix Suns as an example...everyone knew what they were going to do every night...super talented teams like the Spurs could slow them down some nights, but the Suns never decided okay, let's abandon our run and gun, let it fly from 3 mentality and just attack them inside tonight with our tiny little big men because the Spurs will never see that coming!
And when the Suns faced a team with Big Front court, they were not magically better defending the paint just because they knew and GDP'd they would be attacked inside.
And as it pertains to BB...GDP could be okay if we had the ability to change during the game or at least make halftime adjustments....if I think you are going to bomb on me from 3 all game long, so I run a 3-2 zone and choose GDP of "They'll attack outside"...but your team comes out moving the ball around looking for the open jump shot inside the arc...I would switch up my D a little bit to adjust to your slight adjustment...not stick with the same losing strategy all game long.