After my second viewing, I realised that Obi-wan isn't useing the high ground thing as a "strategy." He doesn't want to hurt, or kill Anakin and he knows what he'll be forced to do if Anakin tries to kill him... You can tell the way it's filmed and the way the lines are said, that the high ground thing is merely a way for Obi-wan to say "Please, Anakin. Don't do it." He just doesn't say it in those words, because he's probably trying to hide the fact that he doesn't want to hurt Anakin (at least untill after the battle).
Then Anakin, being the arogant, confused and angry person he's become, says "You don't know the extent of my power!" Or something along those lines, basically saying don't tell me what I can and can't do, because I'm way better than you.
So complaining about the high ground thing is pretty dumb, because it's obvious the way it was meant to be taken...
Also during my second viewing, I noticed that the Death Star actually looked a lot more complete than I had originally thought. So I now am leaning more towards the side saying it shouldn't of been shown. Though, the point by Ric does make sense.