Hmm, I think the flaws are what generally make games.
I played thousands of hours on a bunch of Quake 3 engine games (Q3:A, RTCW, ET)...
If you moved your mouse in a certain way you would go faster, and as a result there were a class of players that were speed demons.
These flaws are often ground out now, and I think that limits community-driven creativity. Especially since most games are impossible to mod now.
Eventually we found ways to limit this (limit fps in competitive configs as an e.g.) to prevent those with the best PCs have an unfair advantage.